Question

Solve:

$\sqrt{40-x^2}-6=0$

Answer 1

We have,

$\sqrt{40-x^2}-6=0$

$\sqrt{40-x^2}=6$

On squaring both sides, we get

$40-x^2=36$

$x^2=40-36$

$x^2=4$

$x=\pm 2$

Hence, this is the answer.