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Can you run through the system of equations substitution method?

help me with understanding about adding and subtracting rational expressions

could you help me with this please [ File > http://lhh.tutor.com/SharedSessionFiles/9f5648ac-6244-4821-87b4-5be6b373a076_adaptive.docx ]

given a polynomial and one of its factors, find the remaining factors of the polynomial. 2x^3-5x^2-28x+15 ; x+3

I have a math problem of adding polynomials and combining like term that involve fractions and I cannot figure out how to do it.

how do I multiply (2x+3) (4x-2)?

I'm stuck... the problem is 8x^3+32x^2+8x+32. Factor completely. I've pulled out 8x as the GCF an gotten 8x(x^2+4x+5) then mn=c and M+n=b so mn = 5 and m+n = 4. but that would have to be 5 and -1... but the polynomial is all positive so I don't know what I'm doing wrong

Simplify the problem on the board

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