Two ways to solve it. Pick whichever one
is the method you are studying now.
Method 1.
Change to
Isolate the radical term
Square both sides of the equation:
Get 0 on the right by subtracting 9x
from both sides:
Factor the left side
Setting gives
Setting gives
Both answers check.
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Method 2.
Let
Then squaring both sides of that we have
So the equation becomes
Now we factor the left side:
gives gives
But we want x, not w, so since
For
For
Edwin