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Help.

NotSoSmart  Nov 1, 2017
 #1
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(3x+2)(3x-2)

ProMagma  Nov 1, 2017
 #2
avatar+771 
+1

This problem is what is known as a difference of perfect squares.

The standard form of this is \((ax^2-b^2)=(\sqrt{a}x+\sqrt{b})(\sqrt{a}x-\sqrt{b})\).

In this the a=9 and the b=4.

So \((9x^2-4)=(3x-2)(3x+2)\).

AdamTaurus  Nov 2, 2017

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