Question

1) x.(5-2x)+2x.(x-1)=15

Answer 1

x . (5 - 2x) + 2x . (x - 1) = 15

5x - 2x² + 2x² - 2x = 15

(5x - 2x) + (2x² - 2x²) = 15

3x = 15

x = 15 : 3

x = 5

 

Answer 2

 

x.(5-2x)+2x.(x-1)=15

<=>5x-2x²+2x²-2x=15

<=>3x=15

<=>x=5

 

Answer 3

Ta có: \(x\left(5-2x\right)+2x\left(x-1\right)=15\)

<=> \(5x-2x^2+2x^2-2x=15\)

<=> \(3x=15\)

<=>x=15

Answer 4

=>5x-2x²+2x²-2x=15

=>3x=15

=>x=5

Answer 5

1) x . ( 5 - 2 x ) + 2 x . ( x - 1 ) = 15
=> 5x - 2x² + 2x² - 2x = 15 
=> ( 5x -2x ) + ( 2x² - 2x² ) = 15 
=> 3x = 15 
=> x = 15 :3 
=> x = 5