SOLUTION: 9x4=25x2 -16 the x is to the 4th power, and the x is 2 the 2nd power , didn't know hot to type these right on the computer/ Its a "substitution problem so i replaced x squared

Question 15681: 9x4=25x2 -16
the x is to the 4th power, and the x is 2 the 2nd power , didn't know hot to type these right on the computer/ Its a "substitution problem so i replaced x squared with a t so i get 9t2 (t squared ) -25t +16. . i cannot figure out how to factor this.
Answer by rapaljer(4671) (Show Source): You can put this solution on YOUR website!
First of all, you can use the subsitution, but don't LOSE the equation. What you probably mean is this:

This factors into:

Notice that the outer times outer term is -9t, and the inner times inner is -16t, and this adds up to -25t, which is the middle term.

Also, .

Now you have to go back and solve for x, where you made the substitution

or

R^2 at SCC
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