Given f(x)=-2x^(2)+9x, find f(-4) Answer:

Substitute and Simplify: Given the function f(x) = -2x^2 + 9x, we need to find the value of f(-4). This means we will substitute x with -4 in the function and simplify. Calculation: f(-4) = -2(-4)^2 + 9(-4)Calculate Square of -4: First, calculate the square of -4. Calculation: (-4)^2 = 16Multiply -2 by Square: Now, multiply -2 by the square of -4. Calculation: -2 * 16 = -32Multiply 9 by -4: Next, multiply 9 by -4. Calculation: 9 * (-4) = -36Add Results to Find f(-4): Finally, add the two results together to find f(-4). Calculation: f(-4) = -32 - 36 = -68

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Given
f(x)=-2x^(2)+9x, find
f(-4)
Answer:

Given $f(x)=-2 x^{2}+9 x$ , find $f(-4)$ $\newline$ Answer:

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Algebra 2

Evaluate expression when a complex numbers and a variable term is given

Full solution

Q. Given

f(x)=-2 x^{2}+9 x

, find

f(-4)

\newline

Answer:

Substitute and Simplify: Given the function $f(x) = -2x^2 + 9x$ , we need to find the value of $f(-4)$ . This means we will substitute $x$ with $-4$ in the function and simplify. $\newline$ Calculation: $f(-4) = -2(-4)^2 + 9(-4)$
Calculate Square of $-4$ : First, calculate the square of $-4$ . $\newline$ Calculation: $(-4)^2 = 16$
Multiply $-2$ by Square: Now, multiply $-2$ by the square of $-4$ . $\newline$ Calculation: $-2 \times 16 = -32$
Multiply $9$ by $-4$ : Next, multiply $9$ by $-4$ . $\newline$ Calculation: $9 \times (-4) = -36$
Add Results to Find $f(-4)$ : Finally, add the two results together to find $f(-4)$ . $\newline$ Calculation: $f(-4) = -32 - 36 = -68$