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Question
how do you simplify the square root of 90
Hi Tia,
When you simplify square roots, you want to look for perfect squares that are factors of the number.
In your example sqrt(90), look at the list of perfect squares:
1, 4, 9, 16, 25, 36, 49, 64, 81
Of these, only 9 will divide 90, so
sqrt(90) = sqrt(9 * 10) = sqrt(9) * sqrt(10) = 3 * sqrt(10)
I hope this helps you.
Steve
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Answers by Expert:
Steve Holleran
Expertise
I can help with all math questions from basic math to Calculus. Whether it`s consumer questions, or questions from high school or college students, I have probably dealt with it at some time in my career.
Experience
33 years teaching experience in NJ public schools
Education/Credentials
B.S. Mathematics : Wake Forest University 1972
M.S. Mathematics : Monmouth University 1981
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