The given expression is .
(Square on each side)
(Cancel square and root:
)
(Subtract
from each side)
(Apply additive inverse property:
)
(Multiply each side by negative one)
(Rewrite
)
(Apply distributive property)
(Apply distributive property)
(Take the 1st factor equal to zero)
(Take the 2nd factor equal to zero)
The equation , on substitute
.
(Multiply:
)
(Add:
)
(
)
The check solution is true.
\The solutions are .