Question

2a=2(o 2 encima do A)+4ab+2b=2(o 2 encima do B);para A=4e b=-4

Answer 1

Seria assim?

2a² + 4ab + 2b²

a = 4; b = - 4

2.(4²) + 4.4.(-4) + 2.(-4)²
2.16 + 16.(-4) + 2.16
32 - 64 + 32
32 + 32 - 64 = 64 - 64 = 0