👤

a)(1-√3)²+(1+√3)²-(1-√3)(1+√3)=

b)(2√5+√2)²-(2√5-√2)²+(2√5+√2)(2√5-√2)=

c)[tex]\frac{2}{5}[/tex] -2√3) ([tex]\frac{2}{5}[/tex] +2√3)+(- [tex]\frac{2}{5}[/tex] -√2)([tex]\frac{2}{5}[/tex] +2√3)=

d)(0,7+√11)²-(0,7-√11)²(-0,7-√11)+(√11-0,7)(0,7+√11)