Question

Find the indicated value of each function f(x)=-8x+14+15x^2 find f(-3)

Answer 1

f(-3):

`\\ \rm\Rrightarrow 15x²-8x+14`

`\\ \rm\Rrightarrow 15(-3)²-8(-3)+14`

`\\ \rm\Rrightarrow 15(9)+24+14`

`\\ \rm\Rrightarrow 135+38`

`\\ \rm\Rrightarrow 173`

Answer 2

`\qquad\qquad\huge\underline{{\sf Answer}}`

Let's evaluate ~

`\qquad \sf  \dashrightarrow \:f(x) =- 8x + 14 + 15 {x}^(2)`

we have to find value of f(-3), so plug the value of x as -3 in the equation ~

`\qquad \sf  \dashrightarrow \:f( - 3) =- 8( - 3) + 14 + 15 {( - 3)}^(2)`

`\qquad \sf  \dashrightarrow \:f( - 3) = 24 + 14 + 15 {(9)}^{}`

`\qquad \sf  \dashrightarrow \:f( - 3) = 38+ 135`

`\qquad \sf  \dashrightarrow \:f( - 3) = 173`

I hope it's easy to understand now ~