Question

if x=1/2√3 find the value of x³-2x²-7x+5​

Answer 1

Answer:

if x=1/2√3

p(x) = x³ - 2x² - 7x + 5

p(1/2√3) =  (1/2√3)³ - 2(1/2√3)²-7(1/2√3) +5

             = 3√3/8 -3/2 - 7√3/2 + 5

            = 3√3-12-28√3+40/8

            = -28-25√3/8