Question

Ex 3 va rog H.E.L.P !! EXPLICIT SI URGENT

Answer 1

$a) \sqrt{27} + \sqrt{12} = 3 \sqrt{3} + 2 \sqrt{3} = (3 + 2) \sqrt{3} = 5 \sqrt{3}$

$b) \sqrt{8} - \sqrt{18} = 2 \sqrt{2} - 3 \sqrt{2} = (2 - 3) \sqrt{2} = - 1 \sqrt{2} = - \sqrt{2}$

$c) \sqrt{32} - \sqrt{72} = 4 \sqrt{2} - 6 \sqrt{2} = (4 - 6) \sqrt{2} = - 2 \sqrt{2}$

$d) \sqrt{45} - \sqrt{20} = 3 \sqrt{5} - 2 \sqrt{5} = (3 - 2) \sqrt{5} = 1 \sqrt{5} = \sqrt{5}$