Question

X2-4x=-4 Solve using quadratic formula (find x)

Answer 1

Add 4 to both sides of the equation.
x^2+4x+ 4 =0

4±√4^2−4⋅(1⋅4)
————————
2⋅1

x= -2

Answer 2

x=2

Explanation:

`x^2-4x=-4`

`x^2-4x+4=-4+4` (Add 4 to both sides)

`x^2-4x+4=0`

Now, we can solve it using quadratic formula

`x_(1,\:2)=\cfrac{-\left(-4\right)\pm √(\left(-4\right)^2-4* \:1* \:4)}{2* \:1}`

`x_(1,\:2)=\cfrac{-\left(-4\right)\pm √(0)}{2* \:1}`

`x=\cfrac{-\left(-4\right)}{2* \:1}`

`x=2`

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