(-b -+ sqr rt (b)sqd - 4ac) / 2a ?

[nix-j-c]

i couldnt write that properly easily i'll try again here now i got more space.

-b (plus or minus) the square root of b squared - 4ac
--------------------------------------------------------------------------
2ac

what does it mean. i have a new maths teacher and he was talking so quicly that i couldnt understand him and i didnt have time to talk to him at the end of the lesson. but he said you use it to work out equations of lines on a graph but all we did in the lesson was work it out the easy way and he said you didn't need this equation for what we are doing but its useful. but useful for what?

[factor-fiction]

x= -b�(√(b�-4ac)/2a

Try this:

http://www.purplemath.com/modules/quadform.htm

or

http://en.wikipedia.org/wiki/Quadratic_equatio n

[factor-fiction]

I missed a set of brackets. i meant to type

x= (-b�(√(b�-4ac))/2a

The a, b and c relate to the coefficients a and b and the constant c for an equation in the form ax� + bx + c

If you prefer a video this may help.
https://www.youtube.com/watch?v=s80J2dAUUyI

[factor-fiction]

...where ax� + bx + c =0

[knobbsworth.]

wtf


hth

[nix-j-c]

yeah thats what i was trying to type but i didn't know how to do some of the symbols. thanx for the link i understand what he was jabbering on about now.

[nix-j-c]

how do you get the plus or minus sign?, square root sign?, and squared/cubed little numbers?

[factor-fiction]

Type in Word (using insert symbols where necessary) and then cut and paste into your answerbank posting.
Try it- ��șŷ as π

[rov1200]

What's it useful for:

Your equation is called a quadratic. When a car designer is working out how the suspension springs will bounce. If they were too weak you would carry on bouncing long after they started. If they were made too stiff it would make for a very hard ride. So using this formuala with different values may gives the ideal situation.

[pawnbroker]

Awright

[k9 fott]

I got a quadratic set of speakers.

I think

[strumpet]

Luvley jubbly