Stuck with constants while integrating

[Eni]

I don’t understand how the second (-2) (in front of the integral sign) gets into the equation. Can you please help me?

 

[Deleted member 4993]

I don’t understand how the second (-2) (in front of the integral sign) gets into the equation. Can you please help me?
View attachment 10976

View attachment 10976

It comes from algebra (distributive property of multiplication). You know:

2 * (A + B) = 2*A + 2*B

 

[Steven G]

View attachment 10976 You know:

2 * (A + B) = 2*A + 2*B

I beg to differ with you

 

[Eni]

View attachment 10976

It comes from algebra (distributive property of multiplication). You know:

2 * (A + B) = 2*A + 2*B

Dear Subhotosh Khan,Thank you, it seems it was much easier than I thought! Wish you a nice day!