Solving quadratics by factoring: leading coefficient â  1 | High School Math | Khan Academy

Sal solves 6x²-120x+600=0 by first dividing by 6 and then factoring.

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[dumpsterraccoon]

Khan Academy is an amazing source for me. I can find a video on any math problems, and if I don't understand it I just find an easier video that they made and work up to it. I have learned far more from Khan Academy this year than from my idiotic teacher who will never lend a hand or provide any assistance.
Thank you for saving my grades.

[aarongao]

shouldn't the answer be 6(x-10)^2, because (x-10)^2 isnt equivalent

[accountstuff]

acK





as a 6th grader am struggling very mooch ;=;

[axelrod]

alright i guess good job but i could do better if u made me a vid explaining domain and range to me like a 5 year old

[Boomurdead]

Thanks, can never remember how to do this. Currently in calc 2 x)

[thevegg]

I compared the graphs of 6x^2 -120x +600 =0 to x^2 -20x +100 =0 and the latter has a wider parabola than the former, therefore I say the equation was changed by dividing both sides by 6.
Thoughs?

[pavel]

But we have simplest way by the calculating Discriminant (D). I found that D = 0, so we just can do it by the formula 'x = -b/2a' and x is the same = 10.
I've spent 30 sec - 1min on Discriminant way, when on this way - nearly 2min with not bad brainstorm. So, I can conclude this way is not practical. Or quadratic equations have some exceptions when D is not working?

[laurenrico]

uhh What grade is this for!!?? IM so confused D:

[lilducko]

Stop doing the easiest possible equations