(6x-9)(5x+8)<(6x-9) ⇔ (6x-9)(5x+8)-(6x-9)<0 ⇔ (6x-9)[(5x+8)-1]<0 <span>⇔
(6x-9)(5x+7)<0 <br>
1)(6x-9)(5x+7)=0 ⇔ x1=9/6=3/2 =1.5 x2= (-7/5)= -1.4
+ - +
---------------------------(-1.4)--------------------------------(1.5)----------------------
Ответ: x∈(-1.4;1.5)