#Solving by Factoring in Context

5 messages · Page 1 of 1 (latest)

pearl mulch
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I suck with context situations, and quadratic stuff

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pearl mulch
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if anyone's like, good at this stuff I have more questions, so stuck

blissful arch
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You're right about the first question, it's n(n+1)

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For part B,
n(n+1)=n^2+n=72
n^2+n-72=0
So, how do you rewrite that in the form of (n+/-p)(n+/-q)?

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I was taught the 'product-sum method' in school. The sum of the two numbers you use is b, and the product is c (from x^2+bx+c)