Asked by penelope
how do you factor 49y^2 - 4x^2 ?
Answers
Answered by
Steve
recall that a^2 - b^2 = (a-b)(a+b)
you have
(7y)^2 - (2x)^2
= (7y-2x)(7y+2x)
you have
(7y)^2 - (2x)^2
= (7y-2x)(7y+2x)
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