Question

problemă algebra , va rog sa răspundeți corect ​

Answer 1

$\it a) \ \ 2\sqrt8-\sqrt{50}+3\sqrt{98}-2\sqrt{72}=\sqrt2(2\sqrt4-\sqrt{25}+2\sqrt{36})=\\ \\ =\sqrt2\cdot(4-5+21-12)=8\sqrt2\\ \\ \\ b)\ \ =\sqrt3(2\sqrt4+4\sqrt9-3\sqrt{16})=\sqrt3\cdot(4+12-12)=-4\sqrt3$