1) 4√20 - √125 = 4√45 - √25 = 42√5 - 5 = 8√5 - 5
2) (3√6 + √12) √3 = 3√6√3 + √12√3 = 3√18 + √36 = 3√92 + 6 = 3*3√2 + 6 = 9√2 + 6
3) (5 - √2)^2 = 25 - 2√2*5 + 2 = 25 - 10√2 + 2 = 27 - 10√2
1) 4√20 - √125 = 4√45 - √25 = 42√5 - 5 = 8√5 - 5
2) (3√6 + √12) √3 = 3√6√3 + √12√3 = 3√18 + √36 = 3√92 + 6 = 3*3√2 + 6 = 9√2 + 6
3) (5 - √2)^2 = 25 - 2√2*5 + 2 = 25 - 10√2 + 2 = 27 - 10√2