Question 205536
12a^2 + 84ab + 147b^2
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A little trick:
If you graph this as 12x^2 + 84x + 147 you
will see that -7/2 is a root.
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That means 2x+7 is a factor.
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Your problem:
= (2a+7b)(6a+21b)
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Cheers,
Stan H.