Question

Упростите выражение......

Answer 1

$1)4\sqrt{a}+3\sqrt{a}-5\sqrt{a}=\boxed{2\sqrt{a}} \\\\2)\sqrt{9x}+\sqrt{25x}-\sqrt{36x}=3\sqrt{x}+5\sqrt{x}-6\sqrt{x} =\boxed{2\sqrt{x}}\\\\3)2\sqrt{4y}+5\sqrt{16y}-\sqrt{121y} =2\cdot 2\sqrt{y}+5\cdot 4\sqrt{y} -11\sqrt{y}=\\\\=4\sqrt{y}+20\sqrt{y}-11\sqrt{y} =\boxed{13\sqrt{y}}$

$4)5\sqrt{c} +3\sqrt{d}-\sqrt{c}+3\sqrt{d}=\boxed{4\sqrt{c}+6\sqrt{d}}\\\\5)-\sqrt{x}+3\sqrt{4y} +\sqrt{9x}-\sqrt{y}=-\sqrt{x}+3\cdot2\sqrt{y} +3\sqrt{x}-\sqrt{y}=\\\\=\boxed{2\sqrt{x}+5\sqrt{y}}$