Question

 выполните действия:
3(1+2xy)(1-2xy);
(x^2+y^3)^2;
(a+b)^2-(a-b)^2;

Answer 1

1) (3+6xy)(1-2xy)=3+6xy-6xy-12(xy)^2=3-12x^y^2

Answer 2

2) x^4+y^6

Answer 3

3) (a+b-a+b)(a+b+a-b)=2a•2b=4ab