SOLUTION: One of two binomials is 2x^3 -5. The sum of the two binomials is 4x^3. What is the degree of their difference?

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Question 1178142: One of two binomials is 2x^3 -5. The sum of the two binomials is 4x^3. What is the degree of their difference?
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
2x%5E3-5%2B%28kx%5E3%2Bc%29=4x%5E3
2x%5E3-5%2Bkx%5E3%2Bc=4x%5E3
%282%2Bk%29x%5E3%2Bc-5=4x%5E3
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system%282%2Bk=4%2Cand%2Cc-5=0%29

The other binomial may be 2x%5E3%2B5.

What is the degree of their difference?
highlight%280%29

Answer by ikleyn(52803) About Me  (Show Source):