September 2018 1 15 Report

Oblicz wartości algebraiczne

a) x2-2y+y dla

x=2 i y-(-5)

x=jedna druga i y=dwie trzecie

x=-2

x=-jedna trzecia i y=(-0,7)

b) x2+-1 dla

x=4

x=2

x=-1

x=jedna piąta

z=0,2

c) Oblicz wartosci wyrażeń

b2-4ac dla:

A) a=2, b=(-3), c=(-2)

B) a=1, b=jedna czwarta, c=1- jedna druga


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