Question

x=√3+1/2,then 4x^3+2x^2-8x+7 =

Answer 1

x=√3+1/2

4x×3+2x×2-8x×x+7

12x+4x-8x+7

12(√3+1/2)+4(√3+1/2)-8(√3+1/2)+7

12√3+12/2+4√3+4/2-8√3+8/2+7

12√3+6+4√3+2-8√3-4+7

12√3+6+4√3+2-8√3+3

=11

I hope this ✌✌✌✌