1. Zapisz w postaci sumy algebraicznej
a) 2ab²(a²-2b) =
b) ½c(4c-2) =
c) (1-x)(x+2) =
d) (5-2x)(5+x) =
e) (y²-y)(y²+1) =
f) (y-1)(y²+y+1) =
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a) 2ab²(a²-2b) =2a³b²-4ab³
b) ½c(4c-2) =2c²-c
c) (1-x)(x+2) =x-x²+2-2x=-x²-x+2
d) (5-2x)(5+x) =25-10x+5x-2x²=-2x²-5x+25
e) (y²-y)(y²+1) =y⁴-y³+y²-y
f) (y-1)(y²+y+1) =y³-y²+y²-y+y-1=y³+y²-1