Question

solutia ecuatiei $\sqrt{x+1} =3$este egala cu
a) -2 b)8 c)-8 d)2

Answer 1

$\rm \sqrt{x+1}=3|~^2 \\ \\ x+1 = 9|~-1 \\ \\ \underline{x=8} \\ \\ \bold{R\v aspuns:b}$