Asked by LP
Factor: 4x^2-81
Answers
Answered by
MathMate
4x^2-81 can be written as (2x)^2-9^2, then apply the identity
a^2-b^2=(a+b)(a-b)
to factorize the expression.
a^2-b^2=(a+b)(a-b)
to factorize the expression.
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