(3x – 1)2 – 5( 2x + 1)2 + (6x – 3) (2x+1) = (x – 1)2
(3x-1)²-5(2x+1)²+(6x-3)(2x+1)-(x-1)²=0
9x²-6x+1-5(4x²+4x+1)+12x²+6x-6x-3-(x²-2x+1)=0
9x²-6x+1-20x²-20x-5+12x²+6x-6x-3-x²+2x-1=0
-24x-8=0
-24x=8 |:(-24)
x=-8/24=-1/3
załącznik
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(3x-1)²-5(2x+1)²+(6x-3)(2x+1)-(x-1)²=0
9x²-6x+1-5(4x²+4x+1)+12x²+6x-6x-3-(x²-2x+1)=0
9x²-6x+1-20x²-20x-5+12x²+6x-6x-3-x²+2x-1=0
-24x-8=0
-24x=8 |:(-24)
x=-8/24=-1/3
załącznik