# How do you solve #sqrt(5x^2 - 40)= 0#?

##### 2 Answers

Mar 12, 2018

#### Explanation:

Square both sides:

#5x^2 - 40 = 0#

#5x^2 = 40#

#x^2 = 8#

#x = +- sqrt(8)#

#x = +-2sqrt(2)#

Both these solutions are valid as they satisfy the original equation.

Hopefully this helps!

Mar 12, 2018

#### Explanation:

- First, square both sides of the equation, so
#5x^2-40=0# - Add
#40# to both sides:#5x^2=40# - Divide by
#5# on both sides:#x^2=8# - Square root on both sides:
#x= +- sqrt(8)#