Question

Simplify the sum.

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Answer 1

@dumbcow

Answer 2

Are you able to factor a trinomial?
All the four trinomials are factoable!

Answer 3

*factorable

Answer 4

i have noo idea,,,

Answer 5

I know its not C.. is it D?

Answer 6

@mathmale

Answer 7

@phi

Answer 8

@zzr0ck3r

Answer 9

\[\frac{d^2+d-30}{d^2+3d-40}\]\[=\frac{(d+6)(d-5)}{(d+8)(d-5)}\] is a start
then cancel get \[\frac{d+6}{d+8}\]for the first term
repeat for the second fraction

Answer 10

I know it is A or D

Answer 11

It is A! righT?

Answer 12

What did you get for the reduced version of the second term?

Answer 13

\[\frac{(d^2+14d+48)}{(d^2-2d-48)}\]
\[=\frac{(d+6)(d+8)}{(d+6)(d-8)}\]
which can be simplified to
\[\frac{d+8}{d-8} \ \ if\ d\ne 6\]

Answer 14

Now you can do the sum:
\[\frac{d+6}{d-8}+\frac{d+8}{d-8}\]
to get the final answer.