Question

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

Answer 1

Heya !!




X = 1/2-√3






Rationalizing the denominator 2-√3 .




X = 1/(2-√3 ) × ( 2 + √3 )/ ( 2 + √3 )





X = ( 2 + √3 )/ (2-√3 ) ( 2+√3 )






X = ( 2 + √3 ) / (2)² - (√3)²












X = ( 2 + √3 )






Therefore,





X² - 2X² - 7X + 5






=> -X² - 7X + 5





=> -(2+√3) - 7 ( 2 + √3 ) + 5






=> -2 - √3 - 14 - 7√3 + 5




=> -8√3 - 11. [ Answer ]

Answer 2

it will be it answer