5 radical 2 (5√2)
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
It is an expression that can be simplified to: 3x-20
3 radical 5
6√5 + 2√5 - 7 = 8√5 - 7, which cannot be simplified.
5 radical 2 (5√2)
76
Sqrt(20) = sqrt(5)*sqrt(4) = 2*sqrt(5)
just round off the number after the decimal if it is above 5.
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
It is an expression that can be simplified to: 3x-20
5/(8 + √7) = (40 - 5√7)/57 is the rationalised equivalent.
13z-9
√5
3 radical 5
6√5 + 2√5 - 7 = 8√5 - 7, which cannot be simplified.
sqrt(3) x sqrt(15) = sqrt( 3 x 15 ) = sqrt( 45 ) = sqrt( 9 x 5 ) = 3 sqrt(5)