Question

factorise. x^2-y^2+6y-9
do it fast ​

Answer 1

Answer:

= (x + y - 3)(x - y + 3). Pls mark me as brainliest.

Step-by-step explanation:

$= x^2 - y^2 + 6y - 9\\= x^2 - (y^2 - 6y + 9)\\= x^2 - (y^2 - 2(y)(3) + 3^2)\\a^2 - 2ab + b^2 = (a - b)^2\\= x^2 - (y - 3)^2\\a^2 - b^2 = (a+b)(a-b)\\= (x+y - 3)(x - y+3)$