# How do you solve #4x^2 = 81#?

##### 1 Answer

Feb 24, 2016

#### Answer:

x = ±

#### Explanation:

#" isolate the " x^2 " term , by dividing by 4 "# hence

# x^2 = 81/4 #

#rArr x = ± sqrt(81/4) = ± 9/2 #