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How exactly do I solve this equation?
x2  12x = 36
 one year ago
 one year ago
How exactly do I solve this equation? x2  12x = 36
 one year ago
 one year ago

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kevsturgeBest ResponseYou've already chosen the best response.1
\[x^212x+36=0\] now solve the quadratic
 one year ago

kevsturgeBest ResponseYou've already chosen the best response.1
gives x=6 can yuo see why
 one year ago

precalBest ResponseYou've already chosen the best response.2
you can use the quadratic formula or you can factor it you can also, look at its graph and see where it crosses the x axis
 one year ago

kevsturgeBest ResponseYou've already chosen the best response.1
here yuo can factor the eqn, Do you know how to do this?
 one year ago

ThisShouldFeelLikeFireBest ResponseYou've already chosen the best response.0
I don't understand how you got x = 6...
 one year ago

ThisShouldFeelLikeFireBest ResponseYou've already chosen the best response.0
I'm sorry... I'm so confused. /:
 one year ago

ThisShouldFeelLikeFireBest ResponseYou've already chosen the best response.0
Oh! Wait I think I get it!!
 one year ago

ThisShouldFeelLikeFireBest ResponseYou've already chosen the best response.0
Took me a little bit :P Thank you both a ton!!
 one year ago

kevsturgeBest ResponseYou've already chosen the best response.1
if you factorise the equation you get (x6)(x6) so when (x6)=0 x=6 Do you see
 one year ago

kevsturgeBest ResponseYou've already chosen the best response.1
Here is how I practice factorising write the factorised end point i.e. (x+3)x+4) and expand the brackets to give\[x^2+4x+3x+12 \rightarrow x^2+7x+12\] now I take \[x^2+7x+12\] and work backwards because I know it will definitely factorise
 one year ago

kevsturgeBest ResponseYou've already chosen the best response.1
wow that's the hard way! but it does always work. Try to factorise it before going through all this stress
 one year ago

precalBest ResponseYou've already chosen the best response.2
just presenting multiple ways to solve it. Quadratic formula works 100% of the time, factoring does not
 one year ago

kevsturgeBest ResponseYou've already chosen the best response.1
that's what I said :P
 one year ago
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