因式分解计算题 (2a+b)^2-(2a+b)(2a-b) (2a+3b)^2(3b-2a)^2 (x-2y+3)(x+2y-3) 4x^2+y^2=(2x-y)^2+____?___
问题描述:
因式分解计算题 (2a+b)^2-(2a+b)(2a-b) (2a+3b)^2(3b-2a)^2 (x-2y+3)(x+2y-3) 4x^2+y^2=(2x-y)^2+____?___
(2a+b)^2-(2a+b)(2a-b)
(2a+3b)^2(3b-2a)^2
(x-2y+3)(x+2y-3)
4x^2+y^2=(2x-y)^2+____?___
答
(2a+b)^2-(2a+b)(2a-b) =(2a+b)[(2a+b)-(2a-b) ]=(2a+b)(2a+b-2a+b)=2b(2a+b)=4ab+2b^2(2a+3b)^2(3b-2a)^2 =[(3b+2a)(3b-2a)]^2 =(9b^2-4a^2)^2 =81b^4+16a^4-72a^2b^2 (x-2y+3)(x+2y-3)=[(x-(2y-3)][x+(2y-3)]=x^2-...还有两题、、好把、、没看见、、已经结束了