Question

Given f(x) = 2x2 − 3x + 7, find f(2.5)

Answer 1

`f(x) = 2 {x}^(2) - 3x + 7 \\ f(2.5) = 2 {(2.5)}^(2) - 3(2.5) + 7 \\ f(2.5) = 12.5 - 7.5 + 7 \\ \boxed{f(2.5) = 12}`

• f(2.5) = 12 is the right answer.

Answer 2

12

Explanation:

Given that,

f(x) = 2x² - 3x + 7

To find the value of f ( 2.5 ), replace x with 2.5 and solve the equation.

Let us solve it now.

f(2.5) = 2(2.5)² - 3×2.5 + 7

f(2.5) = 12.5 - 7.5 + 7

f(2.5) = 12