Question

if x=1/2+√3 , find the value of 2x^3-7x^2-2x+1​

Answer 1

Answer:

2(1/2+√3)^3-7(1/2+√3)^2-2(1/2+√3)+1

2(1/8+3√3+3/4×√3+3×1/2×3)-7(1/4+3+√3)-1-2√3+1

1/4+6√3+3/2×√3+9-91/4-7√3-2√3

1/4-91/4+9+6√3-7√3-2√3+3√3/2

-90+36 whole divided by4+3√3/2-3√3

-54/4-3√3

-54-12√3(whole divided by) 4