Question

solve if x=1/2-√3,find the value of 2x^2+7x+5​

Answer 1

Answer:

26+15√3

Step-by-step explanation:

x=1/2-√3

x=2+√3

2x²=(2+√3)² × 2

    =7+4√3 × 2

    =14+8√3

2x²+7x+5 ​= 14+8√3+7(2+√3)+5

                =14+8√3+14+7√4+5

                =26+15√3