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Simplifying Expressions

18.

3 - 2
12 + x - x2 x2 - 9

4x - 6 - 7 - 2x
x - 5 5 - x

a - 5
a2 + 11a + 30 a2 + 9a + 20

Solution Preview

18. 3/(12+x-x^2) - 2/(x^2-9)
= -3/(x-4)(x+3) - 2/(x+3)(x-3)
= -3(x-3)/(x-4)(x+3)(x-3) - 2(x-4)/(x-4)(x+3)(x-3)
= ...

Solution Summary

Expressions are simplified.

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