How do you combine (-16x^2 + 13x - 13) - (-19x^2 - 11x + 12)(−16x2+13x−13)−(−19x2−11x+12)?

1 Answer
MeneerNask
Jun 6, 2015

Because of the -−sign you reverse all the signs in the second term (and of course you change the -− into a ++:

=(-16x^2+13x-13)+(19x^2+11x-12)=(−16x2+13x−13)+(19x2+11x−12)

Now get rid of the brackets and add like terms:
=-16x^2+13x-13+19x^2+11x-12=−16x2+13x−13+19x2+11x−12
=(-16x^2+19x^2)+(13x+11x)+(-13-12)=(−16x2+19x2)+(13x+11x)+(−13−12)

=3x^2+24x-25=3x2+24x−25

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