Factorise a trinomial or cube in a fraction and cancel

1. A.
   $\frac{x + 9}{x + 7}$
2. B.
   $\frac{x - 7}{x + 7}$
3. C.
   $\frac{x + 7}{x - 7}$
4. D.
   $\frac{x - 9}{x + 7}$

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1. A.
   $x^2 + 5x + 25$
2. B.
   $x^2 - 25$
3. C.
   $x^2 + 10x + 25$
4. D.
   $x^2 + 25$

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1. A.
   $(5a + 8b)^2$
2. B.
   $25a^2 - 64b^2$
3. C.
   $(5a - 8b)^2$
4. D.
   $25a^2 - 36b^2$

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1. A.
   $3y - 2x$
2. B.
   $2y - 3x$
3. C.
   $3x - 2y$
4. D.
   $2x - 3y$

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