SOLUTION: ±√324 - how do you solve this

Algebra.Com
Question 769484: ±√324 - how do you solve this
Answer by tommyt3rd(5050)   (Show Source): You can put this solution on YOUR website!
A method of extracting roots is to use the factorization of a number (by successively dividing out primes until the number is manageable)
factoring 324...
324=2*162=
2^2*81=2^2*9^2

so that 324 = (2*9)^2 = 18^2

therefore the square root of 324 is 18
±√324 = ±18

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