Question

Hcf of x^2 - y^2 + 4y - 4​

Answer 1

`(x - y + 2) * (x + y - 2)`

Explanation:

`{x}^(2) - {y}^(2) + 4y - 4`

➡️
`{x}^(2) - ( {y}^(2) - 4y + 4)`

➡️
`{x}^(2) - (y - 2 {)}^(2)`

➡️
`(x - (y - 2)) * (x + (y - 2))`

➡️
`(x - y + 2) * (x + y - 2)`