PSAT Math : How to subtract square roots

Study concepts, example questions & explanations for PSAT Math

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Example Questions

Example Question #21 : Square Roots And Operations


Possible Answers:

None of the available answers

Correct answer:


Let us factor 108 and 81

Example Question #1 : How To Subtract Square Roots

Possible Answers:

Correct answer:



Step one: Find the greatest square factor of each radical

For  this is , and for  it is .


Step two: Simplify the radicals

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