Question

if a = 1/2+ √3 and b = 1/2 - √3, then find a² + b²- ab
plz answer me ASAP

Answer 1

Answer:

Step-by-step explanation:

a=1/(2+√3)=(2-√3)/((2+√3)(2-√3))=(2-√3)/(4-3)=2-√3

b=1/(2-√3)=(2+√3)/((2-√3)(2+√3))=(2+√3)/(4-3)=2+√3

a²+b²-ab=(2-√3)²+(2+√3)²-(2-√3)(2+√3)

=2(2²+√3²)-2²-√3²

=2×7-1

=14-1

=13