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4x²-8x=4x²+16x+16
-24x=16
x=-16/24=-2/3
x(2x-1)=2(x+2)²
2x²-x=2x²+8x+8
-9x=8
x=-8/9
4x²-8x=2x²-16x-16
4x²-8x-2x²+16x=-16
10=-16|:10
x=-16/10 (w ułamku)
x=-8/5
x(2x-1)=2(x+2)²
2x²-1x=2(x²+2x+4)
2x²-1x=2x²+4x+8
1x²=14|:1x²
x=14