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

User Liberateur
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2 Answers

12 votes

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

User Ifnotak
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4.2k points
7 votes


\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 ~

User TkDodo
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