How much is (5x^6 + 9x^3 - 6x) + (-9x^7 - 20x^2 - 6x)?

1 Answer
Alan P.
Aug 1, 2015

-9x^7+5x^6+9x^3-20x^2-12x

Explanation:

Grouping by powers of x this could be written as
color(white)("XXXX"){: (,,+5x^6,+9x^3,,-6x), (+,-9x^7,,,-20x^2,-6x):}
color(white)("XXXX")"-------------------------------------------------------"
color(white)("XXXX"){: (" ",-9x^7,+5x^6,+9x^3,-20x^2,-12x) :}

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