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Mathematics 10 Online
OpenStudy (anonymous):

polynomials are killing me... (-x^4+9x^3-7x)+(-x^4-2x^3+9)

OpenStudy (campbell_st):

just collect the like terms -x^4 -x^4 +9x^3 -2x^3 -7x + 9 which can be written as \[(-1 -1)x^4 + (9 -2)x^3 - 7x + 9\] just simplify the brackets

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