Question

几道因式分解 帮帮忙了 都怪自己太笨了

x²-5x+4
x²-x-6
2x²+3x-5
3x²+x-10
2x²+7x+3
6x²-x-5
6x²+8x+2
x²+8x+12
-2x的三次方+4x²+2x

Answer 1

x^2-5x+4 =(x-1)(x-4)
x^2-x-6=(x-3)(x+2)
2x^2+3x-5=2(x-5/2)(x+1)
3x^2+x-10=3(x+2)(x-5/3)
2x^2+7x+3=2(x+1/2)(x+3)
6x^2-x-5=6(x-1)(x+5/6)
6x^2+8x+2=6(x+1/3)(x+1)
x^2+8x+12 =(x+6)(x+2)
-2x的三次方+4x²+2x=-2x(x-1+根号2)(x-1-根号2)

Answer 2

(X-1)(X-4)
(X-3)(X+2)
(X-1)(2X+5)
(3X-5)(X+2)
(2X+1)(X+3)
(6X+5)(X-1)
2(3X+1)(X+1)
(X+2)(X+6)
最后只能化为-2X( x²-2X-1)是不是题目写错了

Answer 3

（x-1)(x-4)
(x-3)(x+2)
(2x+5)(x-1)
(3x-5)(x+2)
(2x+1)(x+3)
(6x+5)(x-1
2(3x+1)(x+1)
(x+2)(x+6)
最后个你确定题目没错？

Answer 4

1.x=4/x=1
2.x=3/x=-2
3.x=1/x=-5/2
4.x=-2/x=5/3
5.x=1/x=-5/6
6.x=-1/x=1/3
7.x=-6/x=-2
8有问题。。。

Answer 5

(x-4)(x-1)
(x-3)(x+2)
(2x+5)(x-1)
(3x-5)(x+2)
(2x+1)(x+3)
(6x+5)(x-1)
2(3x+1)(x+1)
(x+2)(x+6)
-2x(x²-2x-1)