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Mathematics 15 Online
OpenStudy (anonymous):

Solve x^2-14x+58=0

OpenStudy (anonymous):

OpenStudy (anonymous):

Do you know about Quadratic Formula?

OpenStudy (anonymous):

For equation like : \(ax^2 + bx + c = 0\) \[x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\]

OpenStudy (anonymous):

In your equation : \(a=1\), \(b=-14\) and \(c = 58\) Just plug in the values and find the value(s) of \(x\)..

OpenStudy (anonymous):

I hope you are not sleeping right now. :P

OpenStudy (anonymous):

x^2-14x+58=0 This implies (x^2-14x+49)+9=0 This implies (x-7)^2=-9 This implies x=7+/-3i

OpenStudy (anonymous):

@HugoHuynh

OpenStudy (anonymous):

option D is correct

OpenStudy (anonymous):

@waterineyes see my solution.:)

OpenStudy (anonymous):

Completing the square method is also good.. :)

OpenStudy (anonymous):

Good use of brain.. :) @Princer_Jones :)

OpenStudy (jhannybean):

I would work with completing the square over quadratic formula any day.... even though one leads to the other <.< lol

OpenStudy (anonymous):

Quadratic Formula is also derived by Completion of Square Method only.. :P

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