Question

dadas as matrizes A [3 -2 15 10] e B 5 1 10 2] calcule:
a) a + b
b) a - b​

Answer 1

Explicação passo-a-passo:

a) A + B

   $\left[\begin{array}{ccc}3&-2\\-15&10\\\end{array}\right]+\left[\begin{array}{ccc}5&1\\10&2\\\end{array}\right]$

   $\left[\begin{array}{ccc}3+5&-2+1\\-15+10&10+2\\\end{array}\right]=\left[\begin{array}{ccc}8&-1\\-5&12\\\end{array}\right]$

*************************************************************************************

b) A - B

   $\left[\begin{array}{ccc}3&-2\\-15&10\\\end{array}\right]-\left[\begin{array}{ccc}5&1\\10&2\\\end{array}\right]$

   $\left[\begin{array}{ccc}3-5&-2-1\\-15-10&10-2\\\end{array}\right]=\left[\begin{array}{ccc}-2&-3\\-25&8\\\end{array}\right]$