September 2018 2 21 Report

Zad 1.Podane wyrażenia doprowadź do najprostrzej postaci.

a) 3x+6x-4y-2x+3x+9x

b) -3x-11y+(-6)y-3

c) (x-4)+6(3x-2)-5(2-x)

d)-(4-y)+7(y-7)-(-3)(2y-6)

Zad 2. Oblicz wartość podanego wyrażenia.

a) -12x-(y^{2} -7)+5x dla x=-2 i y= \frac{1}{4}

b)\frac{1}{2} a+2(-3b+a)-6 dla a=1 i b= 0,5


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