Solve. Please help?

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1 Answer
jim p.
Dec 14, 2017

x = 7 or x = -2

Explanation:

Well, if log(A) = log(B), then, logically, A = B.

So, you can write: #x^2-9 = 5x+ 5#

If you subtract #5x + 5# from both sides, you have:

#x^2 - 5x - 14 = 0#. Which is a quadratic equation, which you probably know how to solve, but for completeness, we will proceed. By inspection, you can factor it:

#(x - 7)(x+ 2) = 0#

This equation is true when x = 7 or x = -2

GOOD LUCK

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