Question

Dau coroana pt ex (32 a,b)

Answer 1

a)

$2 \sqrt{6} + 3 \sqrt{3} (8 \sqrt{3} - 2(4 \sqrt{3} - 2 \sqrt{2} )) = 2 \sqrt{6} + 3 \sqrt{3} (8 \sqrt{3} - 8 \sqrt{3} + 4 \sqrt{2} ) = 2 \sqrt{6} + 3 \sqrt{3} \times 4 \sqrt{2} = 2 \sqrt{6} + 12 \sqrt{6} = 14 \sqrt{6}$

b)

$50 + 2 \sqrt{5} (65 \sqrt{2} - 5(13 \sqrt{2} - 3 \sqrt{5} )) = 50 + 2 \sqrt{5} (65 \sqrt{2} - 65 \sqrt{2} + 15 \sqrt{5} ) = 50 + 2 \sqrt{5} \times 15 \sqrt{5} = 50 + 150 = 200$