а)(2,5x+3)(4x-1)-2,5x(4x+2)<3</p>
10х^2-2,5х+12х-3-10х^2-5х<3</p>
4,5x-3<3</p>
4.5x<3+3</p>
4.5x<6</p>
х<4/3</p>
х<1 1/3</p>
б)(1-4x)^2-(8x-1)(2x+1)>0
1-8х+16х^2-(16х^2+8х-2х-1>0
1-8х+16х^2-(16х^2+6x-1)>0
1-8х+16х^2-16x^2-6x+1>0
2-14x>0
-14x>-2
х< 1/7