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OpenStudy (anonymous):
How do I factor this equation: a^2+10ab-39b^2
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OpenStudy (anonymous):
What factors of -39 add up to 10? \(13\times -3=-39\), and \(13+(-3)=10\). So, you can factor the expression as \[a^2+10ab-39b^2=(a+13b)(a-3b)\]
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