Question

Question :- x² + 6xy - z² + 9y²

solution :- The value of x² + 6xy - z² + 9y²
= x²+ 6xy + 9y² - z²
= ( x + 3y ) ² - z²
= ( x - 3y - z ) ( x + 3y - z )

By using formula :- a² b² = ( a - b ) ( a + b ) ​

Answer 1

Question :- x² + 6xy - z² + 9y²

solution :- The value of x² + 6xy - z² + 9y²

= x²+ 6xy + 9y² - z²

= ( x + 3y ) ² - z²

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

By using formula :- a² b² = ( a - b ) ( a + b )