How to factorize x³-5x²-4x-20=0
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x 3 − 5 x 2 + 4 x − 20
Group the first two terms and the last two terms.
( x 3− 5 x 2 ) + 4 x − 20
Factor out the greatest common factor (GCF) from each group.
x 2 ( x − 5 ) + 4 ( x − 5 )
Factor the polynomial by factoring out the greatest common factor, x − 5 .
( x − 5 ) ( x 2 + 4 )
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