Posted by chris on Saturday, October 24, 2009 at 5:44pm.
ax^2 - cy + ax - 2ax^2 +2cy^2 -ax -cy^2 + ax^2 +cy = cy^2
The ax, ax^2 and cy terms cancel each other out, leaving you with cy^2 (c * y squared or c * y to the second power).
cy^2 = c * -3 * -3 = 9c (A negative times a negative is a positive).
I hope this helps. Thanks for asking.
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