Question

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

f(x) = x2+2x
f(x) = x2+2x

f(x) = x2−2x
f(x) = x2−2x

f(x)=x2+2x+4
f of x is equal to x squared plus 2 x plus 4

f(x)=x2+2x−4
f of x is equal to x squared plus 2 x minus 4

Answer 1

f(x) = x^2 + 2x − 4

Explanation: subtract 4 from both sides to get x^2 + 2x − 4 = 0. Graphing f(x) = x^2 + 2x − 4 and finding its x-intercepts gives the solutions.