SOLUTION: Under root(x^2+4*x-21) +under root(x^2-x-6)=under root (6*x^2 -5*x-39)

SOLUTION: Under root(x^2+4x-21) +under root(x^2-x-6)=under root (6x^2 -5*x-39)

Question 963997: Under root(x^2+4*x-21) +under root(x^2-x-6)=under root (6*x^2 -5*x-39)

Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

Factor out the from all terms.

Square both sides,

Remember we factored out the before so that's still part of the solution.
We only removed it so that the calculation wouldn't be messier.

Three possible solutions:

Verifying,

True, good solution.
.
.

Verifying,

Leads to a negative square root so not a real solution.
.
.

Verifying,

Leads to a negative square root so not a real solution.
.
.
Only one real solution,

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