[tex]a)\\\\8x + 6 = 4x(3 - 2x)\\\\8x+6=12x-8x^2\\\\8x+6-12x+8x^2=0\\\\8x^2-4x+6=0\\\\a=8,\ \ b=-4,\ \ c=6\\\\\Delta=b^2-4ac=(-4)^2-4*8*6=16-192=*-176\\\\\Delta < 0,\ brak\ rozwiazania\\[/tex]
[tex]d)\\\\(x + 2)(3x - 1) = (3x + 1)(x - 2)\\\\3x^2-x+6x-2=3x^2-6x+x-2\\\\\3x^2-x+6x-2-3x^2+6x-x+2=0\\\\10x=0\ \ |:6\\\\x=0[/tex]
[tex]b)\\\\6x^2 - 4(x + 3) = 2x(3x - 3)\\\\6x^2 - 4 x -12= 6x^2 -6x\\\\6x^2-4x-6x^2+6x=12\\\\2x=12\ \ |:2\\\\x=6[/tex]
[tex]d)\\\\ (1-2x)(3x+2)=1-(6x+4)(x-1)\\\\3x+2-6x^2-4x=1-(6x^2-6x+4x-4)\\\\-x+2-6x^2 =1-(6x^2-2x-4)\\\\-x+2-6x^2 =1- 6x^2+2x+4 \\\\-x-6x^2 +6x^2-2x=5-2\\\\ -3x=3\ \ |:(-3)\\\\x=-1[/tex]
