rozwiąż działanie na wyrażeniach wymiernych
12 + (1-3x)(1-3x)-(1+3x)(1+3x)
___________________________=
1-9x²
12+1-3x-3x+9x²-1-3x-3x-9x²
------------------------------------ =
12 - 12x
_________
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12 + (1-3x)(1-3x)-(1+3x)(1+3x)
___________________________=
1-9x²
12+1-3x-3x+9x²-1-3x-3x-9x²
------------------------------------ =
1-9x²
12 - 12x
_________
1-9x²