## Dcherry1996 2 years ago It's been so long since I've done these; how do I solve 7x^2-72x+81?

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1. blahblah_who_cares

Well what do you remember?

2. blahblah_who_cares

Like do you remember the general equation?

3. dumbcow

how long has it been :)

4. dumbcow

i programmed the quadratic formula into my calculator to do these real quick

5. blahblah_who_cares

nice. I would do the same, but i dont because it wont help me later on @dumbcow

6. blahblah_who_cares

Are you there? @Dcherry1996

7. Dcherry1996

Yes sorry I mean I remember this... |dw:1358139387150:dw|

8. Dcherry1996

But not what to do if there's a number in front of the x^2

9. mominanisar

it doesn't matter if you use quadratic formula

10. blahblah_who_cares

Ok. Sorry I had to leave. But the general equation is ax^2+bx+c So you get a*c. And you cut the bx into 2 numbers that add up to your a*c. Then you will eventually end up with (x+something)(x+something). And your answers are whatever makes the equation zero.

11. Dcherry1996

^^ I understand that much, but what do I do if there's a number in front of the x^2?

12. blahblah_who_cares

Hero has shown it and he is a great teacher on this site.

13. Dcherry1996

Just saw that, hang on let me go through that