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slamgirl [31]
4 years ago
8

N^2+7n+15=5 show work please

Mathematics
2 answers:
ElenaW [278]4 years ago
4 0
<span>n^2+7n+15=5
n^2 + 7n + 10 = 0
(n + 5)(n + 2) = 0
n + 5 = 0
n = -5
n + 2 = 0
n = -2

Answer: n = -5 and -2</span>
Alex Ar [27]4 years ago
4 0
n^2+7n+15=5

n^2+7n=-10

n^2+7n+(\frac{7}{2})^2=-10+(\frac{7}{2})^2

n^2+7n+\frac{49}{4}=-10+\frac{49}{4}

(n+\frac{7}{2})^2=\frac{9}{4}

n+\frac{7}{2}=\sqrt{\frac{9}{4}}

n=-\frac{7}{2}+\sqrt{\frac{9}{4}}

n=-2
n=-5
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