Question

qual e o valor de X na Inequacao ( 2x -4) .(15-3x) > 0.

Answer 1

(2x-4)*(15-3x)=
= 30x-6x²-60+12x=
= -6x²+42x-60 |÷(-6)
=x²-7x+10

x= 7/2±√(7/2)²-10
x= 3,5±√2,25
x= 3,5±1,5
x1= 5
x2= 2