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"Honest Opinions Please ;-)"

I just had to prove that the derivative of the formula for solving quadratic equations was as follows:

========

We know that (x + m) squared = n
where n is greater or equal to 0

has the following solutions:

x = -m +/- sqrt n

So multiply (x + m) squared to give

x sqrd +2mx + m sqrd = n

or

x sqrd + 2mx + (m sqrd - n) = 0

a(x sqrd) + bx + c = 0 can be written as

x sqrd = (b/a)x + (c/a)x = 0

Therefore

2m = b/a and m sqrd - n = c/a

Therefore

m = b/(2a) and n = m sqrd - c/a

Therefore

n = (b/(2a)) sqrd - c/a

n = (b sqrd)/(4(a sqrd)) - c/a

n = ((b sqrd) - (4ac))/(4(a sqrd))

========

Does it look right to you?

Natbuc wrote:
> Are u using the x= -b(bX4X(aXc))/ aX2 formula?

don't u mean:

x= (-b +/-ROOT(bSQ-4XaXc))/ aX2

And, yes, that's the one I've just proven for FM... pity he has shown no gratitude for it!

Sonic

102.7 mercury FM

Are u using the x= -b(bX4X(aXc))/ aX2 formula?

Fantasy meister???
Are you a dodgey person that has weird dreams or do you like final fantsy???

We all know that women take time and money

Women = time X money

Now, time is money.

Women = money X money
Women = money^2

But remember, money is the root of all evil:

Women= Root(evil)^2

Thus,

Women = Evil

Sonic

FM=Galaxy Cake Bar

FM = 2FM(dumb)

Well done SonicRav!!

That was...erm...enthralling...in a sense.

No problem Fm...

any time!

Sonic

Well, give me praise!!!!

Sonic