Question

What is the answer
-1/2n^2+18=0

n= ___ ​

Answer 1

n = 6 , − 6

Explanation:

Take the root of both sides and solve.

Answer 2

`-\cfrac{1}{2}n^2+18=0\implies 18=\cfrac{1}{2}n^2\implies 18=\cfrac{n^2}{2}\implies 36=n^2 \\\\\\ \stackrel{\textit{taking }√(~~)\textit{ to both sides}}{\pm√(36)=√(n^2)}\implies \pm 6 = n`