Question

x²+2xy para x=-4 e y=0

Answer 1

$- {4 }^{2} + 2 \times 4 \times 0 \\ - 16 + 0 \\ - 16$

Answer 2

Olá!

$- 4 {}^{2} - 8.0 = \\ 16 - 0 =16$