Question

Factorise the polynomial (a+b)^2 - 11 (a+b) - 42

Answer 1

( a + b )^2 - 11 ( a + b ) - 42





=( a + b )^2 - 14(a + b ) + 3 ( a + b ) - 42







=( a + b ) { ( a + b) - 14 } + 3 { ( a + b ) - 14 }







={ ( a + b ) + 3 } { ( a + b ) - 14 }







=( a + b + 3 ) ( a + b - 14 )

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