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A (x) = ( x + 2 ) ( x - 3 ) + ( x - 3 )
A (x) = x² - 3 x + 2 x - 6 + x - 3
A (x) = x² - 9
A ( 3) = 9 - 9 = 0
B (x) = ( 2 x - 3 )²
b (x) = 4 x² - 12 x + 9
B ( 1.5) = 4 * 1.5² - 12 *1.5 + 9 = 9 - 18 + 9 = 0
a) P = 2 ( 4 x + 7 + 2 x + 4 )
P = 8 x + 14 + 4 x + 8
P = 12 x + 22
A = ( 4 x + 7 ) ( 2 x + 4 )
A = 8 x² + 16 x + 14 x + 28
A = 8 x² + 30 x + 28
