Question

Упростите выражение: √50а-√98а+√242а

Answer 1

$sqrt{50}a - sqrt{98}a+ sqrt{242}a= sqrt{25cdot2}a - sqrt{49cdot2}a+ sqrt{2cdot121}a= \ =5sqrt{2}a - 7sqrt{2}a+ 11sqrt{2}a=9sqrt{2}a$

Answer 2

$sqrt{50a} - sqrt{98a} + sqrt{242a}= sqrt{25*2a} - sqrt{49*2a} + sqrt{121*2a} =\\=5 sqrt{2a} - 7sqrt{2a} + 11sqrt{2a} =9 sqrt{2a}$