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Factor 4n^2+9n+5

 Oct 27, 2019
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4n^2 + 9n + 5 = 0

ab = 20, a+b = 9

5 and 4 work because 5x4=20, 5+4=9

4n^2 + 4n + 5n + 5 = 0

common factor

4n(n+1) + 5(n+1)=0

(4n+5)(n+1)=0

4n+5 = 0, n+1 = 0

n = -5/4, n=-1

 Oct 27, 2019

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