Question

regroup and factorise
$x2 + xy + 9x + 9 y$
​

Answer 1

Answer:

x² +9x + xy +9y

=> x × x +9 × x + x × y + 9 × y

=> x( x +9 ) +y ( x +9 )

=> ( x +9) ( x +y )

Answer 2

★ Factorisation:

$\hookrightarrow$ x² + xy + 9x + 9y

• Factor out x from the expression.

$\hookrightarrow$ x ( x + y ) + 9x + 9y

• Factor out 9 from the expression.

$\hookrightarrow$ x ( x + y ) + 9 ( x + y )

• Factor out ( x + y ) from the expression.

$\hookrightarrow$ ( x + 9 ) ( x + y )

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