Question

Factorize x²+9y²+6xy-z²​

Answer 1

Answer:

The value of x

2

+6xy−z

2

+9y

2

is

= x

2

+6xy+9y

2

−z

2

= (x+3y)

2

−z

2

= (x+3y+z)(x+3y−z) ....By using a

2

−b

2

=(a−b)(a+b)