Question #56e85

1 Answer
Binayaka C.
Feb 4, 2017

Solution: n= -7.27 (2dp) or n= -10.73(2dp)n=−7.27(2dp)orn=−10.73(2dp)

Explanation:

n^2 +18n +74 = -4 or n^2 +18n = -78 or n^2 +18n +81 = -78+81 or (n+9)^2 =3 or n+9 = +- sqrt3 :. n = -9 +sqrt3 = -9 +1.732 = -7.27 (2dp) or n= -9 -sqrt3 = -9-1.732 = -10.73(2dp)

Solution: n= -7.27 (2dp) or n= -10.73(2dp) [Ans]

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