1.-25x^2+5x+2
问题描述：
1.-25x^2+5x+2
2.(x^2-x)^2+10(x^2-x)-24
3.(y^2-3)^2+4y(y^2-3)+4y^2
答
1.
(-5x+2)(5x+1)
2.
(x^2-x-2)(x^2-x+12)
=(x-2)(x+1)(x^2-x+12)
3.
(y^2+2y-3)^2
=[(y-1)(y+3)]^2