Question

Calcule:
(2x-xy)² - x²y²-6x²y
Me ajudem por favoor

Answer 1

(2x-xy)²-x²y²-6x²y

=(2x)²-2.2x. xy+(xy)²-x²y²-6x²y

=4x²-4x²y+x²y²-x²y²-6x²y

=4x²-10x²y

Answer 2

(2x-xy)²-x²y²-6x²y

4x²-2(2x+xy)+xy²

4x²-4x²y+(xy)²-x²y²-6x²y

4x²-4x²y+x²y²-x²y²-6x²y

4x²-10x²y