Deriving a Quadratic Equation

[pale wraith]

You are almost there. Just take the square root and add 6/5.

https://i.imgur.com/4Zmu886.png

If the -4/25 is throwing you off, that is simply telling you that the quadratic has no real solutions. It does have two complex solutions.

[real shard]

Why not use the power rule?

[dense perch]

I forgot the other part of the question. It's to derive that equation given the line y=3x-4 and the origin

[real shard]

Oh ok

[real shard]

I haven't learned any calculus, but how does that information change the derivative of the quadratic?

[dense perch]

Well my teacher is asking to derive. In other words prove how this equation is valid

[real shard]

Oh so you basically have to find the derivative without using the power rule?