Factor the expression. 64x2 - 9

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in Algebra 1 Answers by Level 1 User (580 points)

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1 Answer

64x^2 - 9

When you have something like (?)x^2 - (?) it's easy to factor.  Get the square roots of the two parts

sqrt ( 64x^2 ) = 8x

sqrt ( 9 ) = 3

Then your answer is this:

(8x - 3)(8x + 3) = 64x^2 - 9
by Level 13 User (103k points)

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