Question

[4^2+(5-3)^2] ÷ (9-7)^2

Answer 1

4^2=16
(5-3)^2=4
(9-7)^2=4

[16+4]÷4
20÷4=5

Answer 2

Vejamos:

[4^2 + (5 - 3)^2] ÷ (9 - 7)^2 =
[16 + (2)^2] ÷ (2)^2 =
[16 + 4] ÷ 4 =
20 ÷ 4 =
5

Bons estudos!