Question

write the coefficient of y in the expansion of (5-y)^2

Answer 1

Heya!

=(5-y)^2

=(5)^2 + (y)^2 - 2*(5)*(y)

=25 + y^2 - 10y

The coefficient of y in the above expression is (-10) .

Hope it helps u.

Answer 2

Answer:

-10

Step-by-step explanation:

The given expression is

$(5-y)^2$

We need to find the coefficient of y in the expansion of given expression.

Algebraic formula:

$(a-b)^2=a^2-2ab+b^2$

Using algebraic formula we get

$(5-y)^2=(5)^2-2(5)(y)+(y)^2$

$(5-y)^2=25-10y+y^2$

Here, the coefficient of y is -10.

Therefore, the coefficient of y in the expansion of given expression is -10.