October 2018 1 11 Report

Zamień sumę na iloczyn i oblicz jego wartość liczbową. a). 2x² - 55x dla x= 30 b). 9x² + 30x + 25 dla x= -15 c). x(x-3) + 2x - 6 dla x= 98 d). 2x² - 2x - (x-1) dla x= 13


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