Question

If j = 7 and k = -3, find the value of 2(j + k)^2.
options
16
64
32
36
Please explain! It's not 64 and I don't know what I did wrong?!

Answer 1

Give 32, I'll explain.
(J + k) = 7 + (- 3)
(+) with (-) = ( - )
7 - 3 = 4 (its (j + k))
4 ^ 2 = 16
2 x 16 = 32