Which are factors of x2 – 4x – 5? Check all that apply. (x – 5) (x – 4) (x – 2) (x + 1) (x + 5)
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Solution :
x² - 4x - 5
Splitting the middle term , we get
= x² - 5x + 1x - 5
= x( x - 5 ) + 1( x - 5 )
= ( x - 5 )( x + 1 )
Therefore ,
( x - 5 ) and ( x + 1 ) are two factors of
given expression.
••••
x² - 4x - 5
Splitting the middle term , we get
= x² - 5x + 1x - 5
= x( x - 5 ) + 1( x - 5 )
= ( x - 5 )( x + 1 )
Therefore ,
( x - 5 ) and ( x + 1 ) are two factors of
given expression.
••••
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