Question

Evaluate the function.
ƒ(x) = −3x² − x – 15

Find f(−8)

Answer 1

Given ~

`\:`

`\tt \: f(x) = −3x² − x – 15`

`\:`

now , put x= -8 in the function ~

`\:`

`\tt \: f( - 8) = −3( - 8)² − ( - 8) – 15`

`\:`

`\tt f(-8) = −3(64) − (-8) – 15`

`\:`

`\tt f(-8) = −192 − (-8) – 15`

`\:`

`\tt f(-8) = −192 − (-8) – 15`

`\:`

`\tt f(-8) = −184 – 15`

`\:`

`\underline{\boxed{\red {\tt f(-8) = - 199}}}{\green ✓}`

`\:`

hope helps ~