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docker41 [41]
2 years ago
11

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

Mathematics
2 answers:
Amiraneli [1.4K]2 years ago
8 0

Answer:

x=2

Step-by-step 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 \sqrt{\left(-4\right)^2-4* \:1* \:4}}{2* \:1}

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

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

x=2

~

sergij07 [2.7K]2 years ago
3 0

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

4±√4^2−4⋅(1⋅4)
————————
2⋅1

x= -2
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