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Answer to Question #6330 in Algebra for Brandy

Question #6330
Simplify 7√7 - 2√4 - 2√63
Expert's answer
7 sqrt(7)-2 sqrt(4)-2 sqrt(63)=
7 sqrt(7)-2 sqrt(2*2)-2 sqrt(7*9)=
7 sqrt(7)-2*2-2*3 sqrt(7)=
sqrt(7)-4

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