Question

a+b
a+b ⬜

a=4 e b=2

Answer 1

a+b, para a = 4 e b=2

a+b+a+b
(4)+(2)+(4)+(2)
6 + 6
12

Answer 2

(a+b)*(a+b)
a=4
b=2

a²+ab+ba+b²
a²+b²+2ab
4²+2²+2(2*4)
16+4+4+8
16+8+8
16+16
32