Question

1)Решите неравенство 4х^2+6х<9х^2-14х

Answer 1

4x^2+6x-9x^2+14x<0
-5x^2+20x<0
-5x(x-4)<0
-5x<0 x<0

x-4<0
x<4

Answer 2

4x^2+6x<9x^2-14x
-5x^2 +20x<0/ *(-1)
5x^2 -20x<0
D= 400
x1= (20 + 20)/10=4
 x2= (20 - 20)/10=0
Ответ : 0 ; 4