give the simplest form.
7.
[tex] \frac{x {}^{2} - 2x - 3 }{15 - 2x - x {}^{2} } [/tex]
8.
[tex] \frac{ - x {}^{2} + x + 2}{x {}^{2} - 3x + 2 } [/tex]
9.
[tex] \frac{2x {}^{2} + x - 21 }{2x {}^{2} - 3x - 9 } [/tex]
10.
[tex] \frac{(x {}^{2} - y {}^{2})(x {}^{2} + xy + y {}^{2} )}{(x {}^{3 } - y {}^{3})(x + y) } [/tex]
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Answer:
1. (x+1)
(x-5)
2. (x+1)
(x-1)
3. Trinomial can not be factored