Multiply through by x2
Multiply 3 by , get
Square , get
Add to both sides:
Factor the left side:
Get LCD of 4 on the right side:
Write the left side as the square of a binomial since
both factors are the same.
Multiply the 28 by the numerator 4 on the right side.
Finish combining the right side:
Take square roots of both sides, remembering ±
on the right side.
Use the + on the right
Subtract from both sides:
<-- that's one solution.
Go back to
Use the - on the right
Subtract from both sides:
<-- that's the other solution.
The solution set is {-7,4}
Edwin