October 2018 2 24 Report

Doprowadz wyrażenia do najprostrzej postaci ;

a) 9x ( x +2 ) - (3x - 1) (3x + 1 )

b) (2y + 5z ) (2y -5z ) - 5z (y-5z)

c) (2a + 3b ) do kwadratu - 4a(a- 2b ) +(a+b ) ( a - 9b )

d) (5 y-2z ) ( 5y +2z ) +4z (y+z ) - 25 y do kwadratu


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