Question

reduce la expresión√128 - 2 √98 - √50

Answer 1

$\sqrt{128}-2 \sqrt{98}- \sqrt{50}= \\ \\ \sqrt{2^6*2} -2 \sqrt{7^2*2}- \sqrt{5^2*2} = \\ \\ 2 ^3 \sqrt{2} -2*7 \sqrt{2} -5 \sqrt{2} = \\ \\ 8 \sqrt{2}-14 \sqrt{2}-5 \sqrt{2}= \\ \\ (8-14-5) \sqrt{2}= \\ \\ \boxed{-11 \sqrt{2} }$