How do you simplify #(4x^3 + 13x – 7) – (6x^2 + 9x + 2)#?

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Answer 1 · 2016-05-16T10:01:09

#" "4x^3-6x^2+4x-9#

The minus sign to the left of the last bracket is saying; remove all of what is in that bracket.

Another way of dealing with this is ; multiply everything inside the right bracket by #(-1)#

The outcome for both these is the same.

so we have

#" "4x^3+13x-7" "-6x^2-9x-2#

#" "4x^3-6x^2+(13x-9x)+(-7-2)#

#" "4x^3-6x^2+4x-9#