wartosc liczbowa wyrazenia 2(y do szescianu - y do kwadratu - y - 2) - y (2 y do kwadratu - 4y - 4 ) dla y = -3 wynosi?
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y = -3
2(y³ - y² - y - 2) - y(2y² - 4y - 4) = 2y³ - 2y² - 2y - 4 - 2y³ + 4y² + 4y = 2y² + 2y - 4
2 x (-3)² + 2 x (-3) - 4 = 2 x 9 - 6 - 4 = 8
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2(y³-y²-y-2)-y(2y²-4y-4)=2y³-2y²-2y-4-2y³+4y²+4y=2y²+2y-4=2*(-3)²+2*(-3)-4=2*9-6-4=18-10=8