What are the solutions of 6x2 = 12x?

x = 0, x = −2

x = 0, x = 2

x = 6, x = 2

x = 6, x = −2

Question

What are the solutions of 6x2 = 12x?

 x = 0, x = −2

 x = 0, x = 2

 x = 6, x = 2

 x = 6, x = −2

anonymous · Answer

6x^2 = 12x
y = -6x^2 + 12x + 0

This is a quadratic equation. You can solve this with the quadratic formula:

anonymous · Answer

This is the formula.

anonymous · Answer

Just plug in the known values and solve. :)

anonymous · Answer

x = 0
x = 2

anonymous · Answer

-.- fine but idk what im plugging in!

anonymous · Answer

That's your answer. :)

anonymous · Answer

isnt it supposed to be -2?

anonymous · Answer

No, the answer is B.

jim_thompson5910 · Answer

or...

6x^2 = 12x

6x^2 - 12x = 0

6x(x-2) = 0

6x = 0 or x-2 = 0

x = 0 or x = 2

which gives you the same answers

anonymous · Answer

alright, ohh i get it.. thank you both!

jim_thompson5910 · Answer

the quadratic formula is useful in any case you have a quadratic...so it's probably best to get used to the formula (and use it anyway)

jim_thompson5910 · Answer

so you can get practice

anonymous · Answer

You can check this by putting both of the answers in to the equation.

6(0)^2 = 12(0)
0 = 0

6(2)^2 = 12(2)
6(4) = 24
24 = 24

See? Both 0 and 2 are solutions.

anonymous · Answer

yes i do.. help on my other problem?