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2013-06-05T14:37:58+02:00

A = (x + 4)(x + 3)

A = x² + 3x + 4x + 12

A = x² + 12x + 12

 

B = (y + 3)(2y + 8)

B = 2y² + 8y + 6y + 24

B = 2y² + 14y + 24

 

C = (3z + 4)(5 - 6z)

C = 15z - 18z² + 20 - 24z

C = -18z² - 9z + 20

 

D = (-7t + 8)(3 - 5t)

D = -21t + 35t² + 24 - 40t

D = 35t² - 61t + 24