6√5 + 2√5 - 7 = 8√5 - 7, which cannot be simplified.
2√20 - 3√7 - 2√5 + 4√63 = 2√(4 x 5) - 3√7 - 2√5 + 4√(9 x 7) = 4√5 - 2√5 - 3√7 + 12√7 = 2√5 + 9√7
5 radical 2 (5√2)
3 radical 5
5 - 2*sqrt(3) is already in simplest radical form, note that if you said 5 - sqrt(12) is definitely simplified to 5 - 2*sqrt(3).
This would simplify as 4x-5
15
2√20 - 3√7 - 2√5 + 4√63 = 2√(4 x 5) - 3√7 - 2√5 + 4√(9 x 7) = 4√5 - 2√5 - 3√7 + 12√7 = 2√5 + 9√7
5 radical 2 (5√2)
76
5 sq rt of 2
√5
3 radical 5
Sqrt(20) = sqrt(5)*sqrt(4) = 2*sqrt(5)
5 - 2*sqrt(3) is already in simplest radical form, note that if you said 5 - sqrt(12) is definitely simplified to 5 - 2*sqrt(3).
6/15 which then can be simplified to 2/5
It is an algebraic expression that can be simplified to: 4.5a-2.5
A Huge ASS