Question

dada as matrizes A= [-10 9 -8 0] B= [7 -4 -5 1] calcule A.B ... ME AJUDEEEMM

Answer 1

Resposta:

Explicação passo-a-passo:

A x B

$\left[\begin{array}{cc}-10&9&-8&0\\\end{array}\right] .\left[\begin{array}{cc}7&-4&-5&1\\\end{array}\right] =$

-10.7 + 9.-5 = -70 -45 = -115

-10.-4 +9.1 = 40 + 9 = 49

-8.7 + 0.-5 = -56 + 0 = -56

-8.-4+ 0.1 = 32 + 0 = 32

$\left[\begin{array}{cc}-115&49&-56&32\\\end{array}\right]$