Question

(1,25-3/7.x((-5/4x+14/9)=0

Answer 1

(1,25 - 3/7 x)(-5/4 x + 14/9) = 0

1,25 - 3/7 x = 0 hoặc -5/4 x + 14/9 = 0

*) 1,25 - 3/7 x = 0

3/7 x = 1,25

x = 1,25 : 3/7

x = 35/12

*) -5/4 x + 14/9 = 0

-5/4 x = -14/9

x = -14/9 : (-5/4)

x = 56/45

Vậy x = 56/45; x = 35/12