wyłącz wspulny czynnik poza nawias
a) (a+b)x+(a+b)y
b) (5-x)a+(5-x)b
c)(3x+7)x-(7+3x) x do potęgi 2
d) y do potęgi 3 (4y+3)+(3=4y)y
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a) 2ab(x+y)
B) 5-2x(a+b)
c 3x(7-7+x+x do kwadratu)
d)