Rearranging the quadratic formula

Hi guys, I've been tasked with rearranging the quadratic root formula to make "a" the subject. I've been struggling on this one for a little while now and can't figure out how to isolate a. For reference, the equation i'm referring to is the addition half of the formula, i.e.

x = (-b + sqroot(b^2 - 4ac))/2a

Any help is much appreciated.

Regards,

Sathya

Re: Rearranging the quadratic formula

Because that formula is a root of the equation we know that ax^2+bx+c=0 So ax^2=-bx-c So a=(-bx-c)/x^2

Re: Rearranging the quadratic formula

Thanks very much, I thought it work be a little more complex than that to be honest, but thanks for showing me :)

Very speedy response, cheers.

Re: Rearranging the quadratic formula

Re: Rearranging the quadratic formula

Thank you so much for that extra clarification, that really helps me to understand how to get back to standard form, much appreciated Soroban!

Re: Rearranging the quadratic formula

this is the only confirmation that i can find on the web about subject "a" in the quadratic formula! thanks!