September 2018 1 7 Report

Wskaż te równości, które są prawdziwe dla dowolnych liczb x i y.

1. (-2x + y) ·(-¼) = -8y + 4x

2. (-8x + ⅝y) : ¹/₈ = -64x + 5y

3. (5x - 2) :(-2) = -2,5x + 2

4. 8 (½x - ¾) = 4x - ¾

5. -xy (x - y) = -x²y + xy²

6. -4(½ - ¾x) = -2 + 3x


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