Question

Calculati: -√98+5√32=

Answer 1

-√98+5√32=
1.Descopunerea in factori
98=2×49
32=16×2
-7√2+4√2+5=-3√2+5

Answer 2

$-\sqrt{98}+5\sqrt{32}= \\ \\ 5\cdot4\sqrt{2}-7\sqrt{2}= \\ \\ 20\sqrt{2}-7\sqrt{2}=13\sqrt{2}$