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Simplify the expression: 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 . A. 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 B. 2√ 5 + 9√ 7 C. 2√ 20 − 4√ 7 − 2√ 5 D. 2√ 20 − 3√ 7 + 4√ 63
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Simplify the expression: 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 . A. 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 B. 2√ 5 + 9√ 7 C. 2√ 20 − 4√ 7 − 2√ 5 D. 2√ 20 − 3√ 7 + 4√ 63

User KSTN
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2 √(20)- 3√(7)-2 √(5)+4 √(63)=2 √(4*5)- 3√(7)-2 √(5)+4 √(9*7)= \\ \\ 2 *2√(5)- 3√(7)-2 √(5)+4*3 √(7)=4√(5)- 3√(7)-2 √(5)+12 √(7)= \\ \\ =2 √(5)+9 √(7)

Answer: B. 2√5 + 9√7
User Tidder
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4 votes
B is the right option. hope it helps
User Michael Klement
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