Posted by I NEED HELPPPP!* on .
CAN SOMEONE PLEASE HELPPP!? I NEED HELP IN ALGEBRA, SIMPLIFYING RADICALS! SIMPLIFY THE SQUARE ROOT OF 45a SQUARED!

algebra 
Sarah,
I believe the answer is 3a square root of 5a.

algebra 
Reiny,
√)45a^2)
=√9 * √5 * √a^2
= 3a√5 
algebra 
Chris,
answer is actually : 3a square root of 5.
45a^2 simplied is 9a^2 x 5
square root of 9a^2 is 3a.
Square root of 5 is radical 5.
Squaring your answer would check to see if you have the correct answer.
Thus mine is the correct one. Sarah was close. 
algebra 
Sarah,
oops, my bad. simple mistake.

algebra 
I NEED HELPPPP!*,
thank you sarah reiny and chris !