Question

tìm x biết 

2*x*(x-5)-x*(2*x+3)=26

Answer 1

chả hiểu bn viết j

Answer 2

Ta có:

    2x(x - 5) - x(2x + 3) = 26

<=> 2x² - 10x - 2x² - 3x = 26

<=> -13x = 26

<=> x = 26 : (-13)

<=> x= -2

Vậy x= -2

Answer 3

\(2x\left(x-5\right)-x\left(2x+3\right)=26\)

\(\Leftrightarrow2x^2-10x-2x^2-3x=26\)

\(\Leftrightarrow-13x=26\Leftrightarrow x=-2\)

Answer 4

2x (x-5)-x (2x+3)=26

x(2 (x-5)-(2x+3))=26

x (2x-10-2x-3)=26

x (-13)=26

x=-2

 

Answer 5

2x( x - 5 ) - x( 2x + 3 ) = 26

\(\Leftrightarrow\) \(2x^2\) - \(10x\)   - \(2x^2\)  - \(3x\)  = \(26\)

 \(\Leftrightarrow\)   \(-13x\)                         = \(26\)

  \(\Rightarrow\)    \(x=-2\)