Question

find all the zeros of the equation.
-3x^4+27x^2+1200=0

I'm really confused, can someone help explain?

Answer 1

\(\large\color{black}{ -3x^4+27x^2+1200=0 }\)

say this:

let \(\large\color{black}{a=x^2 }\)

Answer 2

substitute \(\large\color{black}{a }\) for \(\large\color{black}{x^2 }\)
(that would mean that you are substituting \(\large\color{black}{a^2 }\) for \(\large\color{black}{x^4 }\) )

Answer 3

if you have any questions, ask....

Answer 4

this is really confusing