Algebra 2
posted by Jenna .
Subract. Put the answer in the simplest form 9/x4  5/x+4

I will assume you mean:
9/(x4)  5(x+4)
LCD is (x4)(x+4)
= (9(x+4)  5(x4))/((x+4)(x4)
= (9x + 36  5x + 20)/(x^2  16)
= (4x + 56)/(x^2  16)
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