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.

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x