Question
Factorise$ : x^2+ 3x + 2 + ax + 2a$
✓
Answer
$x^2 + 3x + 2 + ax + 2a$
$= x^2 + 2x + x + 2 + ax + 2a$
$= x( x + 2 )+1( x + 2 ) +a( x + 2 )$
$= ( x + 2 )( x + a + 1 )$
$= x^2 + 2x + x + 2 + ax + 2a$
$= x( x + 2 )+1( x + 2 ) +a( x + 2 )$
$= ( x + 2 )( x + a + 1 )$
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