1. Wiedzac, ze xE(2,5) uprosc wyrazenie |7-x| + 2|2x-12| +4 |x-2
2.wyznacz wszystkie elementy zbioru A. A={x:|x+1|=5 ; x|C}
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1.
7-x -2(2x-12)+4(x-2)= 7-x - 4x+24 + 4x - 8= -x + 23
2.
A={-6; 4}
x+1=5 v x+1=-5
x=4 v x=-6
1)
7-x+2(12-2x)+4(x-2)=7-x+24-4x+4x-8=23-x
2)
x+1=5 lub x+1=-5
x=4 lub x=-6