Question

find the value of polynomial 4 x ² - 5 x + 9, when X is equals to 1/2​

Answer 1

if x = 1/2

4x² - 5x + 9 = 4×(1/2)² - 5×(1/2) + 9

⇒ 4 × 0.25 - 2.5 + 9

⇒ 1 - 2.5 + 9

⇒ 7.5