2√20+√28-3√125+4√63-5√80= ? berapah tolong buat skrng

2√20 + √28 - 3√125 + 4√63 - 5√80
= 2√4x5 + √4x7 - 3√25x5 + 4√9x7 - 5√16x5
= 4√5 + 2√7 - 15√5 + 12√7 - 20√5
= 4√5 - 15√5 - 20√5 + 2√7 + 12√7
= -31√5 + 14√7

2√20 + √28 - 3√125 + 4√63 - 5√80
= 2√4•5 + √4•7 - 3√25•5 + 4√9•7 - 5√16•5
= 2•2√5 + 2√7 - 3•5√5 + 4•3√7 - 5•4√5
= 4√5 + 2√7 - 15√5 + 12√7 - 20√5
= 4√5 - 15√5 - 20√5 + 2√7 + 12√7
= -31√5 + 14√7