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2. -2 per -x -2
3. 2x² + 8x - 10
b. x+1/x+2 + -x+1/x-2
(x+1)(x-2)/(x+2)(x-2) + (-x+1)(x+2)
x²+x-2x-2-x²+x-2x+2/(x+2)(x-2)
-2x/(x+2)(x-2)
c. (2x-2)(x+5)
2x²-2x+10x-10
2x²+8x-10