How do you solve #81-1/25x^2=0#?

Question

2421 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-01-21T00:36:20

#81-1/25x^2=0 => x=45#

#81-1/25x^2=0#

#<=>#

#81=1/25x^2# add #1/25x^3# to both sides

#<=>#

#2025=x^2# Multiply both sides by 25

#<=>#

#sqrt(2025)=x# take the square root of both sides

#<=>#

#x=sqrt(25)sqrt(81)=5(9)=45# Simplify