Question

3) Dada a matriz abaixo, o valor de 3.a31 – 5.a22 é: *


a)-25

b)23

c)28

d)-12

e)18

​

Answer 1

$\mathsf{3a_{31}-5a_{22}=3.1-5.(-5)=3+25=28}$

$\huge\boxed{\boxed{\boxed{\mathsf{\maltese~~Alternativa~c}}}}$