Question

5X x ( 2- 3X ) = 4-6X

Answer 1

5x.(2-3x)=4-6x

10x-15x\(^2\)=4-6x

-15x\(^2\)+16x-4=0

15x\(^2\)-16x+4=0( đổi dấu)

(3x-2)(5x-2) =0

Suy ra: 3x-2=0 hoặc 5x-2=0

Nếu 3x-2=0 suy ra x=2/3

Nếu 5x-2=0 suy ra x=2/5

Answer 2

5x(2-3x)=4-6x

10x-15x^2=4-6x

10x-15x^2-4+6x=0

16x-15x^2-4=0

10x+6x-15x^2-4=0

10x-15x^2+6x-4=0

5x(2-3x)+2(3x-2)=0

5x(2-3x)-2(2-3x)=0

(2-3x)(5x-2)=0

+2-3x=0=>x=2/3

+5x-2=0=>x=2/5