Question

sabendo que..........​

Answer 1

Explicação passo-a-passo:

Calculando a:

$a=1.2-3.2\\\\a=2-6\\\\a=-4$

Calculando b:

$b=1.2.3+3.1.1+1.2.1-3.2.3-1.1.1-1.2.1\\\\b=6+3+2-18-1-2\\\\b=-10$

Calculando $a^{2}-2b$:

$a^{2}-2b=(-4)^{2} -2.(-10)\\\\a^{2}-2b=16+10\\\\a^{2}-2b=36$

Resposta B