zad. 17 c,e , 18
Daję najlepsze ;]
5x(2x-3y)-(3x-2y)²=10x²-15xy-(3x²-2y²)=10x²-15xy+9x²+4y²=19x²-15xy+4y²
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5x(2x-3y)-(3x-2y)²=10x²-15xy-(3x²-2y²)=10x²-15xy+9x²+4y²=19x²-15xy+4y²