Answer:
x² + 2x - 4
Step-by-step explanation:
The quadratic equation is ax² + bx + c =0
To solve this, you plug it into the quadratic formula (-b±√(b²-4ac))/(2a).
As it shows in the picture, -B = 2. There is no negative on the two in the equation because the quadratic formula makes any positive number negative in the first part.
The values of A and C are give in the parenthesis because they are being multiplied by -4.
The value for A = 1 and we can leave that as x² because 1 and x have the same value.
The value for C = -4 and that goes at the back of the equation, turning the plus sign after 2x negative.
When you put the equation together, you get x² + 2x - 4
