October 2018 1 19 Report

Przekształć wyrażenia,korzystając z wzorów skróconego mnożenia.

a) (a-\frac{2}{3} )(a+\frac{2}{3} )

(xy+2)(xy-2)

(3a^{2}-b^{3})(3a^{2}+b^{3})

b) (2x^2 - 5y)^2

(ab+3c)^{2}

(3k^3 + 2k^2)^2


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