Question

计算 （-2ab²）²·（3a²b-2ab-1）

4（a-b)²-(2a+b)-(b+2a) （1+x-y)(x+y-1) (x+3y)(x²+9y²)(x-3y)
急！！！！！！

Answer 1

（-2ab²）²·（3a²b-2ab-1）
=4a²b^4·（3a²b-2ab-1）
=12a²b^5-8a²b^5-4a²b^4

4（a-b)²-(2a+b)-(b+2a)
=a²-2ab+b²-2a-b-b-2a
=a²-2ab+b²-4a-2b

（1+x-y)(x+y-1)
=x-(1-y)²
=x-1+2y-y²

(x+3y)(x²+9y²)(x-3y)
=(x²-9y²)(x²+9y²)
=x^4-81y^4

Answer 2

4(a-b)²-(2a+b)-(-b+2a)
=4(a-b）²-2a-b+b-2a
=4(a-b）²-4a
=4[(a-b）²-a]
=4(a²-2ab+b²-a)