Odpowiedź :
[3x-1]²-5[2x+1]²+[6x-3][2x+1]=[x-1]² 9x²-6x+1-5[4x²+4x+1]+12x²+6x-6x-3=x²-2x+1 9x²-6x+1-20x²-20x-5+12x²-3-x²+2x=1 -24x=8 x=-8/24 x=-⅓
(3x-1)²-5(2x+1)²+(6x-3)(2x+1])=(x-1)²
9x²-6x+1-5(4x²+4x+1)+12x²+6x-6x-3=x²-2x+1
9x²-6x+1-20x²-20x-5+12x²-3-x²+2x=1
-24x=8
x=-8/24
x=-⅓
9x²-6x+1-5(4x²+4x+1)+12x²+6x-6x-3=x²-2x+1
9x²-6x+1-20x²-20x-5+12x²-3-x²+2x=1
-24x=8
x=-8/24
x=-⅓