SOLUTION: Find the smaller root for 2(x^2 + 4) = 90 . I wanted to ask if you can help me I don't quite remember how I would go about solving this.

Algebra ->  Square-cubic-other-roots -> SOLUTION: Find the smaller root for 2(x^2 + 4) = 90 . I wanted to ask if you can help me I don't quite remember how I would go about solving this.      Log On


   



Question 985989: Find the smaller root for
2(x^2 + 4) = 90 .
I wanted to ask if you can help me I don't quite remember how I would go about solving this.

Answer by josgarithmetic(39633) About Me  (Show Source):
You can put this solution on YOUR website!
Simplify the equation.

x%5E2%2B4=45

x%5E2=45-4=41

x=0%2B-+sqrt%2841%29