Question

√60 + 2√135 - 2√240 plz show with paperwork im really confused (ncrt playing with numbers)

Answer 1

√60 + 2√135 - 2√240 =

= √4×15 + 2√9×15 - 2√16×15

= √2²×15 + 2√3²×15 - 2√4²×15

= 2√15 + 6√15 - 8√15

= √15(2 + 6 - 8)

= √15(8 - 8)

= √15×0

= 0