Question

x2-y2+6y-9factorise it​

Answer 1

Answer:

= x^2-y^2-6y-9

= x^2-(y^2-6y+9)

= x^2-(y-3)(y-3)

= x^2-(y-3)^2

= (x+y-3)(x-y+3)

the factors of the polynomial x^2-y^2+6y-9 are (x+y-3) and (x-y+3)