Question

(x-2)^4=9^2 cum se face dau coroana

Answer 1

(x-2)^4=9^2
(x-2)^4=(3^2)^2
(x-2)^4=3^4
x-2=3
x=3+2
x=5

Answer 2

$(x-2)^{4} = 9^{2} \\ (x-2) ^{2} =+-9 \\ x-2=+- \sqrt{9} \\ x=+- \sqrt{9} +2$