Question

Solve by formula method (steps are required) :-
x²-2x+4=0

Answer 1

Step-by-step explanation:

x²-2x+4 = 0

x²+4 = 2x

x² = 2x-4

x= root 2x-4

Therefore: x= root 2x or x = root -4

Means x is +2x or -2x

And x is -4 or 4

I am not sure about it .

Answer 2

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Solve by formula method (steps are required) :-

x²-2x+4=0

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$x²-2x+4=0$

$a = 1 \\ b = - 2 \\ c = 4$

$formula \\ x = \frac{ - b± \sqrt{ {b}^{2} - 4ac} }{2a}$

$substitute \: the \: numbes$

$x = \frac{ - ( - 2)± \sqrt{ {( - 2)}^{2} - 4(1)(4) } }{2(1)}$

$x = \frac{2± \sqrt{2 - 16} }{2}$

$x = \frac{2± \sqrt{18} }{2}$

$by \: simplifying$

$x = - \sqrt{18} \: \: or \: \: x = + \sqrt{18}$

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