Rozwiąż podane nierówności: *-do kwadratu a) x(x+1) - (x*+1)< 2(-x+3) b) (2x-3)(2x+3)- 4(4x-2)>(2x-5)* c) 5(x-1)*>2(x*+4)+x(3x+4)+x

a) x(x+1) - (x*+1) < 2(-x+3) x*+x-x*-1<-2x+6 x-1<-2x+6 x+2x<6+1 3x<7 /:3 x>7/3 x>2i1/3

a) x(x+1) - (x*+1)< 2(-x+3) x²+x-x²-1<-2x+6 x+2x<6+1 3x<7 /:3 x<2 ⅓ b) (2x-3)(2x+3)- 4(4x-2)>(2x-5)* 4x²-9-16x+8>4x²-20x+25 -16x+20x>25+9-8 4x>26 /:4 x>6½ c) 5(x-1)*>2(x*+4)+x(3x+4)+x 5(x²-2x+1)>2x²+8+3x²+4x+x 5x²-10x+5>5x²+5x+8 -15x>3 /: -15 x>- 1/5