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1) 3a*5=15a
2) 2a*(-2ab²)=-4a kwadrat b kwadrat
3) -1/4²* (-8xy²)=-1/8xy do kwadratu
oblicz wartość liczbową
2+5x/2- x dla x= -3
2+5*(-3)/2-(-3)=-13/2+3=-6,5+3=-3,5