3)0,5x(x-6)²+2x(8-x/4)=2
0,5x²-6x+18+16x-x²/2=2
1/2x²+10x+18-x²/2=2
x²-x²+10x+18=2
0/2+10x+18=2
10x+18=2
10x=16
x=-1,6
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3)0,5x(x-6)²+2x(8-x/4)=2
0,5x²-6x+18+16x-x²/2=2
1/2x²+10x+18-x²/2=2
x²-x²+10x+18=2
0/2+10x+18=2
10x+18=2
10x=16
x=-1,6