How do you factor #x^4-8x^2+16#?
3 Answers
Explanation:
Make a dumby variable, in this case I will use
Let
You have
This is equivalent to
You can now plug in
You get
Now, you can factor this like a normal polynomial.
or
Finally, you plug in
The factored form will be
Explanation:
Notice how this is almost a simple quadratic trinomial. In fact, it can be thought of as a quadratic of
Let
We can easily factor this quadratic.