Question

Find the value of the polynomial x^3-7x^2+5x-3 at x=1/2

Answer 1

Step-by-step explanation:

Just put x = 1/2 in the polynomial

$= {x}^{3} - 7 {x}^{2} + 5x - 3 \\ \\ \\ = { (\frac{1}{2}) }^{3} - 7 { (\frac{1}{2}) }^{2} + \frac{5}{2} - 3 \\ \\ \\ = \frac{1}{8} - \frac{7}{4} + \frac{10}{4} - \frac{24}{8} \\ \\ \\ \\ \\ = \frac{1 - 14 + 20 - 24}{8} \\ \\ \\ \\ \\ = \frac{ - 17}{8}$

Answer 2

Answer:

x= 1/2

(1/2)³ - 7(1/2)² + 5(1/2) - 3

1/8 - 7/4 + 10/4 - 24/8

1-14+20-24/8 = -17/8