aaronm2056 aaronm2056

11-08-2018
Mathematics

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How to simplify the square root of 80 minus two times the square root of 45?

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helenelisabeth helenelisabeth

11-08-2018

[tex] \sqrt{80}-2 \sqrt{45}= \sqrt{4 \cdot 4 \cdot 5}-2 \sqrt{9 \cdot 5}= 2 \cdot 2 \cdot \sqrt 5 - 2 \cdot 3 \cdot \sqrt 5 = [/tex]

[tex] =4 \sqrt5 - 6\sqrt5=\boxed{-2\sqrt5} [/tex]

-2√5 is your answer

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