Question

Write the coefficient of y in the expansion of 5 minus y square

Answer 1

Hello mate

${(5 - y)}^{2} \\ = 25 + {y}^{2} - 10y$
So coefficient of y is ( -10 )

Thanks

Answer 2

HEY BUDDY...!!!

HERE'S THE ANSWER...

_____________________

=> ( y - 5 )^2

⏺️ using ( a - b )^2 = a^2 + b^2 - 2 a b

=> y^2 + 25 - 10 y

▶️ So coefficient of y in this equation is - 10


HOPE HELPED..

:-)