4sunmoonstar
4sunmoonstar 4sunmoonstar
  • 11-05-2017
  • Mathematics
contestada

2. Simplify and state any excluded values [tex] \frac{x^2-x-6}{x^2+7x+10} [/tex]

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tonb
tonb tonb
  • 11-05-2017
When the denominator is zero, you divide by zero so the roots of that polynomial are excluded. They are x=-5 and x=-2, as can be found using the abc quadratic formula or by factoring.

If you factor numerator and denominator you can rewrite as:

[tex]\frac{(x+2)(x-3)}{(x+5)(x+2)} = \frac{x-3}{x+5} [/tex]
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