Question

Let f(x) = 3x2 - 6x + 2. Find f(-2)

Answer 1

f(x) = 3x² - 6x + 2

f(- 2) = 3·(-2)² - 6·(-2) + 2

= 3·4 + 12 + 2

= 12 + 12 + 2

= 26

Answer 2

Answer:

just put

$x = - 2$

$f( x) = 3 {x}^{2} - 6x + 2$

$f( - 2) = 3 {( - 2)}^{2} - 6( - 2) + 2$

$f( - 2) = 3 \times 4 + 6 \times 2 + 2 =12+12+2 \\ f(-2)= 26$