Question

Coefficent of it in the expansion of (5-y) ²​

Answer 1

Answer:

Hey mate

Step-by-step explanation:

It is (a-b)^2

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

25+y-10y

25-9y is ans

Answer 2

Answer:

$(5 - y) {}^{2} = 5 {}^{2} - 10y + y {}^{2}$

So the coefficent is - 10