配方法分解因式例题答案10道（配方法分解因式）
导读 x^2+2x-3 =x²+2x+1-4 =(x+1)²-4 =(x+1-2)(x+1+2) =(x-1)(x+3) 2x^2-7x+6 =2x²-8x+8+x-2 =2(x-2)²+x-2 =(x-2)(2x-4+1) =...
x^2+2x-3 =x²+2x+1-4 =(x+1)²-4 =(x+1-2)(x+1+2) =(x-1)(x+3) 2x^2-7x+6 =2x²-8x+8+x-2 =2(x-2)²+x-2 =(x-2)(2x-4+1) =(x-2)(2x-3) 3x^2y^2-10xy+7 =3x²y²-3xy-7xy+7 =3xy(xy-1)-7(xy-1) =(xy-1)(3xy-7) -y^2+20y-96 =-y²+20y-100+4 =4-(y-10)² =(2-y+10)(2+y-10) =(12-y)(y-8)。
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