Which of the following is the general form of the equation 5x2 - 20x = 15?

x2 - 4x = 3
x2 - 4x - 3 = 0
5x2 - 20x - 15 = 0

Question

Which of the following is the general form of the equation 5x2 - 20x = 15?


x2 - 4x = 3
x2 - 4x - 3 = 0
5x2 - 20x - 15 = 0

anonymous · Answer

what do u think? :)

anonymous · Answer

Well I'm reviewing past Algebra units, and when I did this quiz, the answer was B. But I forget how I got to that answer. I just need someone to explain the solution.

primeralph · Answer

just move the 15 over to the left

primeralph · Answer

and then divide all by 5

anonymous · Answer

well$$5x^2 - 20x = 15$$subtract 15 from both sides$$5x^2 - 20x -15= 15-15$$$$5x^2 - 20x -15= 0$$divide by 5$$x^2-4x-3=0$$

anonymous · Answer

Ohhhhhh. Makes so much sense! Thanks!!!

primeralph · Answer

nothing for me?

anonymous · Answer

very welcome :)

anonymous · Answer

LOL

anonymous · Answer

@primeralph I couldn't do both, so I just went with who got to my question first. Sorry. I'll have more questions though! ;)

primeralph · Answer

@mukushla  you really shouldn't be posting answers.

anonymous · Answer

answers with enough explanations are allowed here dude :)

primeralph · Answer

No. They said no.

primeralph · Answer

I don't have a prob;em with it, but that's what they said.

anonymous · Answer

i think thats for the direct answers...and yes u r right we should guide students through problems and letting them to do part of it, but thats not necessary all the time

anonymous · Answer

and one more point, when a helper starts to answering someone, we must be patient and let them do their job :)

primeralph · Answer

If you're referring to this case, you did not start helping. You posed a question.

anonymous · Answer

@mukushla Agreed.