October 2018 1 28 Report

1. Usuń nawiasy i zredukuj wyrazy podobne

a) -2x(3x-5y)-(x+2y)(3x-y)=

b) (3x-y+1)-(x+y)+(y-x)=

c) (-8x^3+4x^2-x+1)+(2x^3-3+x^2-6x)-(5x^3-8x^2-3x-1)=

2. Doprowadż do najprostszej postaci i oblicz wartość liczbową

a) 9(x-2y)-(5y-2x)+20y dla x=0,5 y= 0,3

b) (5x+7y)-8(y+1)+3(x+y) dla x=0,5 y=0,25


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