1.wyznacz iloczyn korzystajac ze wzorow skroconego mnozenia.
a) (1+2x)(1-2x)
b) (3x²-1)²
c) (1-2x)³
2.rozwiaz rownanie
a. 2x⁴-8x³+6x²=0
b.5x²+2x⁴+x³=0
c. x³+5x²-x-5=0
d. 81x³-9x²-9x+1=0
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a)1x-2x do kwadratu+2x+4x do kwadratu=1x-4x+2x+16x=-3x+18x=15x