solving quadratics by factoring

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November 8th 2008, 12:44 PM
william

solving quadratics by factoring

x2 – 50 = 0
November 8th 2008, 12:55 PM
mr fantastic

Quote:

Originally Posted by william

x2 – 50 = 0

$x^2 - 50 = 0 \Rightarrow (x - \sqrt{50}) (x + \sqrt{50}) = 0$ ....
November 8th 2008, 12:59 PM
william

thanks for you help!
November 8th 2008, 01:25 PM
kathrynmath

Always use the quadratic formula if you get stuck.
November 8th 2008, 01:27 PM
R_W|F_N

x = (-b +/- sqrt(b-4ac))/2a

:D

p.s. has this place got a tex help page? i'd like ot know how to incorporate it into my posts.
November 8th 2008, 04:40 PM
mr fantastic

Quote:

Originally Posted by kathrynmath

Always use the quadratic formula if you get stuck.

NB: When the question prescribes a particular method, in this case:

Quote:

solving quadratics by factoring

no marks will be awarded for a correct answer obtained using a different method.

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