December 2018 1 11 Report
Doprowadź wyrażenia do najprostszej postaci:
b) (x+y+1)(2x-y)+(-1)(x-1)(2x+3y)
d) (3x+y)(x-5y)-x(x+4y-1)-2x(x-9y)
e) 3-(2+3x)(4x-9)+(5-x)2x
f) 2x(-x+7)-5(x+3)(6-4x)+(1-2x)(-1-x)


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