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[tex]\sqrt{20}-\sqrt{5}=[/tex]
Answers:
(A) $\sqrt{15}$
(B) $\sqrt{10}$
(C) $\sqrt{5}$
(D) $\sqrt{2.5}$
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SAT square root question
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Re: SAT square root question
by red12dog34 » Fri Jul 15, 2022 12:34 am
[tex]\displaystyle\sqrt{20}=\sqrt{2^2\cdot 5}=2\sqrt{5}[/tex]
[tex]\sqrt{20}-\sqrt{5}=2\sqrt{5}-\sqrt{5}=\sqrt{5}[/tex]
The answer is (C).
[tex]\sqrt{20}-\sqrt{5}=2\sqrt{5}-\sqrt{5}=\sqrt{5}[/tex]
The answer is (C).
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Re: SAT square root question
by mycalsuite » Tue Sep 16, 2025 12:01 pm
√20 - √5=?
√20= √4.5= 2√5
√20 - √5= 2√5 - √5 = (2-1)√5 = √5
The correct answer is C √5.
√20= √4.5= 2√5
√20 - √5= 2√5 - √5 = (2-1)√5 = √5
The correct answer is C √5.
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