Question

2√1.215+3√5×(2√80−√50)
Va rog ​

Answer 1

Răspuns:

2√1.215 + 3√5 × (2√80 − √50) =

2√(81×15) + 3√5 × (2√(16×5) - √(25×2) ) =

2×9√15 + 3√5 × (2×4√5 - 5√2) =  

18√15 + 3√5 × 8√5 + 3√5 × (-5√2) =

18√15 + 120 - 15√10