Zapisz w postaci sum algebraicznych.
a) 3x(x-7)
b)a²(a+2b-1)
c)-3xy(x+y-3)
d)5x²(x³+3x-1)
e)-2√2(x³+√2x-2)
f)2²₃x(6x²-9x+¹₈)
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a) 3x(x-7)=3x²-21x
b)a²(a+2b-1)=a³+2a²b-a²
c)-3xy(x+y-3)=-3x²y-3xy²+9xy
d)5x²(x³+3x-1)=5x⁵+15x³-5x²
e)-2√2(x³+√2x-2)=-2√2x³-4x+4√2
f)2²₃x(6x²-9x+¹₈)=8/3x(6x²-9x+¹₈)=16x³-24x²+1/3x