2x^2-(x-2)(x+3)=
问题描述:
2x^2-(x-2)(x+3)=
(m+2n)(2m+n)-(3m-n)(m+2n)=
(x-y)(5x-3y+4z)=
(x-5)(x+4)=
(y-1)(y+3)=
先化简,再求值
(3x-2)(x-3)-2(x+6)(x-5)+3(x^2-7x+13) 其中x=3/1/2.
(3a+1)(2a-3)(6a-5)(a-4) 其中a=-2
答
(3x-2)(x-3)-2(x+6)(x-5)+3(x^2-7x+13) 其中x=3/1/2.
(3a+1)(2a-3)(6a-5)(a-4) 其中a=-2