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Trang chủ / Giải bài tập / Lớp 8 / Toán học / Bài 2: Phương Trình Bậc Nhất Một Ẩn Và Cách Giải
Bài 2: Phương Trình Bậc Nhất Một Ẩn Và Cách Giải
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class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise">Hướng dẫn giải Bài 7 (Trang 10 SGK Toán Đại số 8, Tập 2)</div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> 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<p>Hãy chỉ ra các phương trình b&acirc;̣c nh&acirc;́t trong các phương trình sau:</p> <p><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>a</mi><mo>.</mo><mo>&#160;</mo><mn>1</mn><mo>+</mo><mi>x</mi><mo>=</mo><mn>0</mn><mspace linebreak="newline"/><mi>b</mi><mo>.</mo><mo>&#160;</mo><mi>x</mi><mo>+</mo><msup><mi>x</mi><mn>2</mn></msup><mo>=</mo><mn>0</mn><mspace linebreak="newline"/><mi>c</mi><mo>.</mo><mo>&#160;</mo><mn>1</mn><mo>-</mo><mn>2</mn><mi>t</mi><mo>=</mo><mn>0</mn><mspace linebreak="newline"/><mi>d</mi><mo>.</mo><mo>&#160;</mo><mn>3</mn><mi>y</mi><mo>=</mo><mn>0</mn><mspace linebreak="newline"/><mi>e</mi><mo>.</mo><mo>&#160;</mo><mn>0</mn><mi>x</mi><mo>-</mo><mn>3</mn><mo>=</mo><mn>0</mn></math></p> <p><strong>Giải</strong></p> <p>Phương trình 1 + x =0 là phương trình b&acirc;̣t nh&acirc;́t &acirc;̉n s&ocirc;́ x ( vì có dạng ax + b =0 với a = 1, b = 1</p> <p>Phương trình 1 - 2t = 0 là phương trình b&acirc;̣c nh&acirc;́t &acirc;̉n s&ocirc;́ t (vì có dạng at + b = 0 với a = -2, b = 1)</p> <p>Phương trình 3y = 0 là phương trình b&acirc;̣c nh&acirc;́t &acirc;̉n s&ocirc;́ y (vì có dạng ay + b = 0 với a = 3, b = 0)</p> <p>Các phương trình còn lại kh&ocirc;ng phải là phương trình b&acirc;̣c nh&acirc;́t</p>
Hướng dẫn Giải Bài 7 (Trang 10, SGK Toán 8, Tập 2, Phần Đại Số)
GV: GV colearn
Xem lời giải bài tập khác cùng bài
Hướng dẫn giải Bài 6 (Trang 9 SGK Toán Đại số 8, Tập 2)
Xem lời giải
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class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise">Hướng dẫn giải Bài 8 (Trang 10 SGK Toán Đại số 8, Tập 2)</div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> 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</div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div>
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