Question

root 48- root 72- root 12+ 2 root 18

Answer 1

its 2√12-2√18 -√12+2√18=√12

Answer 2

Hey there!

$\sqrt{48} - \sqrt{72 } - \sqrt{12} + 2 \sqrt{18} \\ now \: \sqrt{48} = 4 \sqrt{3} \\ \: \: \: \: \: \: \sqrt{72 } = 6 \sqrt{2} \\ \: \: \: \: \: \: \: \sqrt{12} = 2 \sqrt{3} \\ \: \: \: \: \: \: \: 2 \sqrt{18} = 3 \sqrt{2} \\ now \: put \: them \: together \\ 4 \sqrt{3} - 6 \sqrt{2} - 2 \sqrt{3} + 3 \sqrt{2} \\ \\ = > \sqrt{12}$
Hope it help