Flashcard 7 - Math Reasoning Flashcard Set for the GED Test

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The correct answer is:

Change all the signs of the terms in the polynomial being subtracted. Proceed to usual addition.

Another method is to distribute the subtraction sign through the polynomial to eliminate the parenthesis.


Explanation:

\[(6x^3 - x^2y +15) - (3x^3 - 4x^2y + 3)\] \[(6x^3 - x^2y + 15) + (-3x^3 +4x^2y - 3)\] \[3x^3 + 3x^2y + 12 = x^3 + x^2y + 4\]

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