[tex]2d)\\\\ 4(x +2)^2-(2x-1)^2=20x+10\\\\4(x^2+4x+4)-(4x^2-4x+1)=20x+10\\\\4 x^2+16x+16- 4x^2+4x-1-=20x-10\\\\ 20x+15=20x+10\\\\20x-20x=10-15\\\\0=-5\\\\rownanie\ sprzeczne , brak\ rozwiazania[/tex]
[tex]3a)\\\\ 4(x-3)^2-(2x-5)^2 \geq 2 \\\\4(x^2-6x+9)-(4x^2-20x+25)\geq 2\\\\ 4 x^2-24x+36- 4x^2+20x-25 \geq 2 \\\\-4x+11\geq 2\\\\-4x\geq 2-11\\\\-4x\geq -9\ \ |:(-4) \\\\x\leq \frac{9}{4}\\\\x\in(-\infty ,\frac{9}{4}>[/tex]
