Question

Simplify the expression: 2√ 20  −  3√ 7  −  2√ 5 +  4√ 63 .

Answer 1

2 sqrt20 - 3 sqrt7 - 2sqrt5 +4 sqrt63

= 4 sqrt5 - 3 sqrt7 - 2 sqrt5 + 12 sqrt7

= 2 sqrt 5 + 9 sqrt 7


Its C

Answer 2

2√20 - 3√7 - 2√5 + 4√63

4√5 - 3√7 - 2√5 + 12√7

2√5 + 9√7

:)