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Mathematics 17 Online
OpenStudy (calculusxy):

Solving equation with quadratic formula. Question will be given below

OpenStudy (calculusxy):

\[\large 2x^2 - 5x = 52\]

OpenStudy (calculusxy):

I know that the quadratic formula is: \[\large x = \frac{ -b \pm \sqrt{b^2 - 2ac} }{ 2a }\]

OpenStudy (amistre64):

a quadratic equation of the form: ax^2 + bx + c = 0 has roots defined by the quadratic formula as: \[x=\frac{1}{2a}(-b\pm\sqrt{b^2-4ac})\] which is just a shortcut of completing the square

OpenStudy (calculusxy):

\[\large x = \frac{ -(-5) \pm \sqrt{(-5)^2 - 2(2)(-52)} }{ 2(2) }\] if i solve it like this will it be fine?

OpenStudy (calculusxy):

@Nnesha @amistre64

OpenStudy (amistre64):

might be a typo, but its 4ac, not 2ac

OpenStudy (amistre64):

otherwise your values for abc are good

OpenStudy (calculusxy):

ok

OpenStudy (calculusxy):

\[x = \frac{ 5 \pm \sqrt {25 + 208} }{ 4 }\]

OpenStudy (calculusxy):

if solve it with this will it be correct? @amistre64

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