把多項(xiàng)式中的項(xiàng)加以變形、添項(xiàng)或一項(xiàng)拆成幾項(xiàng)后,分組分解的方法.例分解因式(1)x3-3x+2;(2)3x5-3x4-13x3-11x2-10x-6;(3)6x4+5x3+3x2-3x-2.解(1)原式=x3-x2+x2-x-2x+2 =(x3-x2)+(x2-x)-(2x-2) =(x-1)(x2+x-2) =(x-1)2(x+2)(2)原式=-3x5+3x4 (本文共 957 字 ) [閱讀本文] >>
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 把多項(xiàng)式中的項(xiàng)加以變形、添項(xiàng)或一項(xiàng)拆成幾項(xiàng)后,分組分解的方法.例分解因式(1)x3-3x+2;(2)3x5-3x4-13x3-11x2-10x-6;(3)6x4+5x3+3x2-3x-2.解(1)原式=x3-x2+x2-x-2x+2 =(x3-x2)+(x2-x)-(2x-2) =(x-1)(x2+x-2) =(x-1)2(x+2)(2)原式=-3x5+3x4 (本文共 957 字 ) [閱讀本文] >>