Question

Find the Solution

Answer 1

\(5\sqrt{x+7}=-10\)
\(\sqrt{x+7}=-2\)
\(x+7=(-2)^2\)
x=-3
as you notice, by squaring desapears the sign. This information is lost. And if you try to plug 3 into original equation, it does not match it.

Answer 2

soemting missing

Answer 3

sry, -3*

Answer 4

extraneous

Answer 5

thanks