Question

using algebraic identity (-y+9) ²​

Answer 1

Answer:

Y²-18Y+81=0

is ut true?

Answer 2

Question :

(-y + 9 )2

Solution :

using identity (a - b)2 = a2 - 2ab + b2

Here,

(-y + 9)2 = y2 + 81 + 2* -y * 9

= y2 + 81 - 18y

so your answer is y2 - 18y + 81

hope it's help