SOLUTION: Please help me with these questions. I don't understand them that well. 2x= {{{ sqrt (4x^2-8x-9) }}} 3x= {{{ sqrt (8x^2+9) }}} {{{ sqrt (-5x)}}} = {{{ sqrt (x+4)}}}

Question 964131: Please help me with these questions. I don't understand them that well.
2x=
3x=
=

Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
.
Square both sides
Subtract from each side.
Add 8x to each side.
Divide each side by 8

.
CHECK:

=+-
.
.
Square both sides.
Subtract from each side.
Find the square root of each side.

.
CHECK:

=+-
.
.
Square both sides.
Subtract x from each side.
Divide each side by -6.
=
.
CHECK:

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