oblicz wyrażenie algebraiczne (2x+2y)-(x+y)+(x-2y) dla x=0,5 , y= -1 szybko pliss
(2*0,5+2*(-1))-(0.5+(-1))+(0,5-2(-1))=(1-2)-(-0,5)+(0,5+2)=-1+0,5+2,5=2
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(2*0,5+2*(-1))-(0.5+(-1))+(0,5-2(-1))=(1-2)-(-0,5)+(0,5+2)=-1+0,5+2,5=2