Mathematics 72 Online
OpenStudy (anonymous):

Use polynomial long division to divide 12x3 – 9x2 + 13x + 4 by 3x2 – 3x + 4. . I have worked the problem numerous times but I do not believe my answer is correct.

OpenStudy (anonymous):

cheat

OpenStudy (anonymous):

This is what I got : 4x + 1 . But when I check it, the solution does not match up. 4x R -3x + 4 ? _____________________ 3x^2 - 3x + 4 l 12x^3 - 3x^2 + 13x + 4 12x^3 - 3x^2 + 16x (sub) 0 0 -3x + 4

OpenStudy (anonymous):

not sure what you mean. check by multiplying

OpenStudy (anonymous):

oh i see the mistake in what you wrote.

OpenStudy (anonymous):

you didn't multipy -3x by 4x. you wrote 12x^3-3x^2+16x it should be 12x^3-12x^2+16x

OpenStudy (anonymous):

okay. i tried to type it so it looked like the actual equation/ my original answer I got was 4x + 1 but I am stilol unsure if that is right

OpenStudy (anonymous):

4x +1 ___________________________ 3x^3-3x+4 12x^3 - 9x^2 + 13x + 4 12x^3-12x^2+16x 4x^2 -3x + 4 4x^2-3x+4 0

OpenStudy (anonymous):

you made another mistake as well when you copied. you put 12x^3 - 3x^2 + 13x + 4 when it should have been 12x^3 - 9x^2 + 13x + 4

OpenStudy (anonymous):

somehow the -9 became a -3

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