2x²-5X-12

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/11/06 15:38:32

2x²-5X-12
7X²-19X-6
X²Y²+2XY-8
X²+2XY-8Y²

2x²-5X-12
=(2x+3)(x-4)
7X²-19X-6
=(7x+2)(x-3)
X²Y²+2XY-8
=(xy+4)(xy-2)
X²+2XY-8Y²
=(x+4y)(x-2y)

(（x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x 解方程x²+x-6分之5x+x²-x-12分之2x-5=x²-6x+8分之7x-10 解方程.（5x/x²+x-6）+（2x-5/x²-x-12）=7x-10/x²-6x+8 (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 (2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x 已知x -2x=5,求代数式x四次方+3x³-12x² -31x-15 1/x²+x+1/x²+3x+2+1/x²+5x+6+1/x²+7x+12,分式 4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½ x(x²-1)+2x²（x+1)-3x（2x-5)计算 (x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简 (x-2)(x-3)+2(x-5)(x+6)-3(x^2-7x+12) (x+2)(x-12)+(x+7)(x+8)+(x+5)(x-10),化简.