Q69. - Algebra 1

Question

If $f\left(x\right)=2x+4$ and $g\left(x\right)=x^2-3$, find each value

$f\left(-3\right)$ 

Step-by-Step Solution

Answer

The value of function is $f\left(-3\right)=-2$.

Step 1. Concept.

For a function $f$, $f\left(a\right)$ represents the value of the function at $x=a$

Step 2. Evaluate the required value.

To evaluate the function value, substitute $-3$ for $x$ in the function $f\left(x\right)$ and simplify further as shown below

$f\left(-3\right)=2\left(-3\right)+4$

Step 3. Calculation.

To simplify further, multiply the numbers and then combine to get

$$\begin{gathered} 2\left(-3\right)+4=-6+4 \\ =-2 \end{gathered}$$