Question

calcule o valor numérico das expressões algébricas ​

Answer 1

Resposta:

a) 2x + 3a

$2.(-3) + 3.1\\-6+3\\=-3$

b) 2a + m

$2.(-2)+8\\-4+8\\=4$

c) a² + 3a

$(-4)^{2}+3.(-4)\\16-12\\=4$$2.7-6\\14-6\\=8$

d) 2x- 6