Question

Пожалуйста алгебру!Срочно , буду благодарен!!

Answer 1

№ 4
3<a+b<8;    2<ab<15;    7<3a+b<18
№ 5
$3x(x-3)-(3x+1)(x+4) textgreater 2-2(11x+3) \ 3 x^{2} -9x-3 x^{2} -x-12x-4 textgreater 2-22x-6 \ -22x-4 textgreater -22x-4$
не имеет решений.
№ 6
$left { {{ frac{5x-4}{6}-1 textgreater frac{2x+1}{3} } atop { {{ frac{3x+1}{4}-2x textgreater 2,5- frac{3x-2}{8} }} right. \ left { {{5x-4-6 textgreater 4x+2} atop {6x+2-16x textgreater 20-3x+2}} right. \ left { {{5x-10 textgreater 4x+2} atop {2-10x textgreater 22-3x}} right. \ left { {{5x-4x textgreater 10+2} atop {3x-10x textgreater 22-2}} right. \ left { {{x textgreater 12} atop {-7x textgreater 20}} right. \ left { {{x textgreater 12} atop {x textless -2 frac{6}{7} }} right.$
Система не имеет решений