Posted by Marty on Tuesday, September 4, 2007 at 5:24pm.
(x^2 + 5)(x^2 - 4)
If you set y = x^2 and look at the original as:
y^2 + y - 20
It should factor easily to
(y + 5)(y - 4)
which equals:
(x^2 + 5)(x^2 - 4)
so would the final answer be (x^2 + 5)(x^2 - 4) or (y + 5)(y - 4) ???
The final answer is
(x^2 + 5)(x^2 - 4)
If you multiply that, you will get your original equation.
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