Question

resolva
3( x^{2} - y^{2} -10(x+y).(x-y) quando x =-2 e y=-2

Answer 1

3 (x²-y²-10 (x+y) .(x-y))=
3 ( (-2)² - (-2)² -10 ((-2) + (-2)) . ((-2) - (-2))=
3 ( 4 -4 -10 (-4) . 0)=
3 .0 =
0