nikaCaronRosanjual nikaCaronRosanjual

24-12-2016
Mathematics

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simplify the polynomial
3x^2 + 6 – 2x + 5x – 4x^2 + 9

A –x^2 + 3x + 15
B 7x^2 + 3x + 3
C x^2 – 3x + 15
D –x^2 + 7x + 15

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JcAlmighty JcAlmighty

25-12-2016

The answer is A –x^2 + 3x + 15

3x² + 6 – 2x + 5x – 4x² + 9

Rearrange it:
3x² + 6 – 2x + 5x – 4x² + 9
= 3x² - 4x² - 2x + 5x + 6 + 9
= -x² + 3x + 15

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