Question

(2+$\sqrt{3}$ ) ^2 + (1-2$\sqrt{3}$ ) ^2 =20

Answer 1

$(2+ \sqrt{3} )^2+(1-2\sqrt{3})^2=4+4\sqrt{3}+3+1-4\sqrt{3}+12=20$

Answer 2

(2+√3)²+(1-2√3)²=2²+2*2*√3+(√3)²+1²-2*1*2√3+(2√3)²=4+4√3+3+1-4√3+12=4+3+1+12=7+1+12=8+12=20