Question

Simplify 3√98- √405+ √500- √72.

Answer 1

Answer:  15√2+√5   Step-by-step explanation: 3√98-√405+√500-√72   Now,   98= 2*49 = 2*7² 405= 9*45 = 5*9² 500=25*20 = 5³*2² 72= 9*8 = 2*6²   Then,  3√2*7² - √5*9² + √5³*2² - √2*6²   => 3*7√2 - 9√5 + 10√5 - 6√2   => (21-6)√2 + (10-9)√5   =15√2 + √5