Use the quadratic formula to solve the equation x2 - 4x = -7

Let's solve your equation step-by-step.

x2−4x=−7

Step 1: Subtract -7 from both sides.

x2−4x−(−7)=−7−(−7)

x2−4x+7=0

Step 2: Use quadratic formula with a=1, b=-4, c=7.

x=

−b±√b2−4ac

2a

x=

−(−4)±√(−4)2−4(1)(7)

2(1)

x=

4±√−12

2

No real solutions.

(c, 0) i might be wrong so don't put full faith on my answer

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value