geometry

kkkitty:

what is the square root of 36

What multiplied by itself equals 36?

Note: you can have both a positive and negative answer to this. This is because a negative number (-a, for example) times itself is positive. See below:
-a * -a = (-1 * a) * (-1 * a) = (-1 * -1) * (a * a) = (1) * (a^2) = a^2

Hi Spc,
Your answer is not completely correct.

By convention, sqrt(25)=+5
Whenever the square root is actually written into the question only the positive answer counts.

However, if the question was
x ² = 25
then your answer is
sqrt(x ²) = sqrt(25)
This time the square root was not a part of the question, I introduced it as a part of the working so the answer is
x = +5 or -5