Question

calculati nr A=($\sqrt5+2 \sqrt3 ^{2} - \frac{40 \sqrt3}{ \sqrt{5} }+( \sqrt{5} -2 \sqrt{3} )( \sqrt{5} +2 \sqrt{3} )-(2 \sqrt{5} - \sqrt{3} ) x^{2}$

Answer 1

V5+12_40V3/V5+(V5-2V3)²-(2V5-V3)x²=V5+12-40V3/V5+5+12-2V5x²+V3x²=5+12V5-40V15+5V5+12V5-10x²+V15x²=5+29V5-40V15-10x²+v15x²