Question

If f(x) = 8x2 + 4x - 12. Find f(2)
f(2)=

Answer 1

f(2) = 28

Explanation:

`\rm f(x) = 8 {x}^(2) + 4x - 12`

`\rm Evaluate \: 8 x^2 + 4 x - 12 \: where \: x = 2: \\ \\ \rm \implies f(2) = 8 * {2}^(2) + 4 * 2 - 12 \\ \\ \rm \implies f(2) = 8 * 4 + 8 - 12 \\ \\ \rm \implies f(2) = 32 - 4 \\ \\ \rm \implies f(2) = 28`