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P 1 = 2 x + 3
P 2 = 2 ( x + 3 ) = 2 x + 6
P 3 = 3 x - 5
P 3 = 3 ( x - 5 ) = 3 x - 15
P 4 = 3 ( x - 2 ) + 8 = 3 x - 6 + 8 = 3 x + 2
p 5 = x² - 1
P 6 = ( x - 1 )² = x² - 2 x + 1
P 7 = 3 ( x - 2 ) + x = 3 x - 6 + x = 4 x - 6
P 8 = 5 ( x + 3 ) - 3 x = 5 x + 15 - 3 x = 2 x + 15
P 9 = ( 6 x + 8 ) /2 - 2 x = 3 x + 4 - 2 x = x + 4
P 10 = [- 4 ( x + 1 ) + 12 ] / 2 = ( - 4 x - 4 + 12 ) / 2 = ( - 4 x + 8 ) /2 )= - 2 x + 4
P 11 = [( x + 3 )² - 9 ] / x - 5
= ( x² + 6 x + 9 - 9 ) : x - 5
= ( x² + 6 x ) : x - 5
= x + 6 - 5
= x + 1
