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4(x²-1)-(4x²-4x+1)=3
4x²-4-4x²+4x-1=3
4x=3+4+1
4x=8
x=2
=4x-4+4x+4+2x²+1=3
=8x+2x²+1=3
4(x²+1) - 4x²+4x+1=3
4x²+4-4x²+4x+1=3
4x=3-4-1
4x=-2/:4
x -0,5