December 2018 2 10 Report
Stosując wzory skróconego mnożenia, wykonaj działanie:

a) (a-\frac{1}{4})(a +\frac{1}{4}) \\ b)(x+2y)(x-2y)\\ c)(2a-5)(2a+5)\\ d)(6a-2b)(6a+2b)\\ e)(4-3x)(4+3x)\\ f)(1-x^2)(1+x^2)
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