Question

9(x+y)² -x² factorise the expression

Answer 1

$9 {(x + y)}^{2} - {x}^{2} \\ = (3 {(x + y))}^{2} - {(x)}^{2} \\ = (3x + 3y + x)(3x + 3y - x) \\ = (4x + 3y)(2x + 3y)$

Answer 2

Answer:

Step-by-step explanation:

9 ( x + y )²- x²

= { 3( x + y ) } ²- ( x )²

= { 3x + 3y + x } { 3x + 3y - x }

= ( 4x + 3y ) ( 2x + 3y ) ( Answer ).