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What is the answer to x^2-16=0 using factoring?

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I NEED HELP ON MATH... please :) i have a math test and have no clue how to do it
asked Nov 9, 2013 in ALGEBRA 1 by abstain12 Apprentice

1 Answer

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x^2 -16 = 0

x^2-4^2 = 0

Recall the formula (a+b)(a-b) = a^2-b^2

(x-4)(x+4) = 0

x-4 = 0 or x+4 = 0

Factors x = -4, 4

answered Nov 9, 2013 by william Mentor

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