Question

Which function should be graphed in order to solve the equation x2+2x=4
?(1 point)
Responses

f(x)=x2−2x
f left parenthesis x right parenthesis equals x squared minus 2 x

f(x)=x2+2x
f left parenthesis x right parenthesis equals x squared plus 2 x

f(x)=x2+2x−4
f left parenthesis x right parenthesis equals x squared plus 2 x minus 4

f(x)=x2+2x+4

Answer 1

To solve the equation \( x^2 + 2x = 4 \), we can rearrange it into the standard form of a quadratic equation. By subtracting 4 from both sides, we get:

\[
x^2 + 2x - 4 = 0
\]

Thus, to solve this equation graphically, we should graph the function:

\[
f(x) = x^2 + 2x - 4
\]

So, the correct response is:

**f(x) = x² + 2x - 4**.