Question

calcule mentalmente o valor de x. a ) √x + 3 = 7 b) 2√x = 12 c ) √x+1 = 7 d ) √x/5 = 1

Answer 1

Olá!

a) x = 46 ---
√49 = 7

b) x = 36 ---
2 . √36
2 . 6 = 12

c) x = 48 ---
√49 = 7

d) x = 5 ---
5 ÷ 5 = 1
√1 = 1