Question

Quadratic formula:

4x^2 + 9 = 12x

How do I solve this equation, if there is no "c"

-b sqroot b^2-4ac / 2a

Answer 1

\[4x^2 + 9 = 12x \\
4x^2-12x+9=0\]

Answer 2

quadratic formula is for the form
\[ax^2+bx+c=0\] only

Answer 3

So can you elaborate how exactly you did that and why?

Answer 4

Oh wait so you change it into that equation/form

Answer 5

the "why" is a good question, which i hope i answered with the second post

Answer 6

the "how" is starting with \[4x^2 + 9 = 12x\] i subtracted \(12x\) from both sides, to put it in the necessary form

Answer 7

I got a -37.5

Which I'm thinking is wrong?

Answer 8

+4
-28

?