Question

What should be added to 1+20-3x to get x-x-1?​

Answer 1

According to the problem,

Let A should be added to1+2x−3x  

2

 to get result,

1+2x−3x  

2

+A=x  

2

−x−1

A=x  

2

−x−1−(1+2x−3x  

2

)

A=x  

2

−x−1−1−2x+3x  

2

 

A=4x  

2

−3x−2

​  

 

Therefore, 4x  

2

−3x−2 added to the equation