Question

Heyyyy....please a little help✨​

Answer 1

`\boxed{2}\\\\ √(12)*3√(60)*√(45)\implies 3√(12* 60* 45)\implies 3√(32400) \\\\\\ 3√(180^2)\implies 3\cdot 180\implies 540 \\\\[-0.35em] ~\dotfill\\\\ \boxed{4}\\\\ (3√(7)-7√(3))(3√(7)+√(3)) \\\\\\ (3√(7))(3√(7))+(3√(7))(√(3))+(-7√(3))(3√(7))+(-7√(3))(√(3)) \\\\\\ 9√(7^2)+3√(21)-21√(21)-7√(3^2)\implies 63-18√(21)-21\implies 42-18√(21) \\\\[-0.35em] ~\dotfill`

`\boxed{6}\\\\ (7√(3)+√(5))(7√(13)+√(5)) \\\\\\ (7√(3))(7√(3))+(7√(3))(√(5))+(√(5))(7√(13))+(√(5))(√(5)) \\\\\\ 49√(3^2)+7√(15)+7√(65)+√(5^2) \\\\\\ 147+7√(15)+7√(65)+5\implies 152+7√(15)+7√(65)`