Question

(12x-48)^2=144

Answer 1

(12x - 48)^2 = 114

(12x - 48)^2 = 12^2

(12x - 48)= 12

12x = 12+48

12x = 60

x = 60/12

x = 5

Answer 2

(12x-48)²=144

(12x-48)²= 12² ( cũng có thể nói 12x-48 = \(\sqrt{144}\))

=>12x-48=12

12x = 12 + 48 = 60

x = 60:12

x = 5