Question

Factorise : 9(x+y)²-x²​

Answer 1

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$\longmapsto \sf9(x + {y)}^{2} - {x}^{2}$

$\longmapsto \sf9( {x}^{2} + {y}^{2} + 2xy) - {x}^{2}$

$\longmapsto \sf9 {x}^{2} + {9y}^{2} + 18xy - {x}^{2}$

$\longmapsto \sf8 {x}^{2} + {9y}^{2} + 18xy$

Answer 2

Step-by-step explanation:

we know that

a²-b² = ( a+b) (a-b)

9 (( x+y+x)(x+y-x))

So , 9 ( 2x + y ) y

9 y ( 2 x + y )

HOPE THIS WILL HELP YOU