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= 2p² - 9p²
2
= - p²
+ 2p
2
= 4p - p²
- 8
2
= - p² + 4p - 16
2
2). 1 per x - 1 + 1 per x + 1 per 1 per x - 1
= 1
- 1
x
= 1 - x 1
+
x x
= 2 - x 1
+
x x
= 3 - x
- 1
x
= ( 3 - x ) - ( x )
x
= 3 - 2x
x