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ThisShouldFeelLikeFire
Group Title
How exactly do I solve this equation?
x2  12x = 36
 2 years ago
 2 years ago
ThisShouldFeelLikeFire Group Title
How exactly do I solve this equation? x2  12x = 36
 2 years ago
 2 years ago

This Question is Closed

kevsturge Group TitleBest ResponseYou've already chosen the best response.1
\[x^212x+36=0\] now solve the quadratic
 2 years ago

kevsturge Group TitleBest ResponseYou've already chosen the best response.1
gives x=6 can yuo see why
 2 years ago

precal Group TitleBest 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
 2 years ago

kevsturge Group TitleBest ResponseYou've already chosen the best response.1
here yuo can factor the eqn, Do you know how to do this?
 2 years ago

ThisShouldFeelLikeFire Group TitleBest ResponseYou've already chosen the best response.0
I don't understand how you got x = 6...
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.2
dw:1338677027789:dw
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.2
dw:1338677062779:dw
 2 years ago

ThisShouldFeelLikeFire Group TitleBest ResponseYou've already chosen the best response.0
I'm sorry... I'm so confused. /:
 2 years ago

ThisShouldFeelLikeFire Group TitleBest ResponseYou've already chosen the best response.0
Oh! Wait I think I get it!!
 2 years ago

ThisShouldFeelLikeFire Group TitleBest ResponseYou've already chosen the best response.0
Took me a little bit :P Thank you both a ton!!
 2 years ago

kevsturge Group TitleBest 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
 2 years ago

kevsturge Group TitleBest 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
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.2
dw:1338678477379:dw
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.2
dw:1338678551861:dw
 2 years ago

kevsturge Group TitleBest 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
 2 years ago

precal Group TitleBest 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
 2 years ago

kevsturge Group TitleBest ResponseYou've already chosen the best response.1
that's what I said :P
 2 years ago
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