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How do you write $9 x^{2} - 4$ $9x^2 - 4$ in factored form?

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Konstantinos Michailidis

Sep 16, 2015

It is $9 x^{2} - 4 = {(3 x)}^{2} - 2^{2} = (3 x - 2) (3 x + 2)$ $9x^2-4=(3x)^2-2^2=(3x-2)(3x+2)$

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