5p²-25+20 FACTORISE
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5p2−25p+20)÷5(p−4)
⇒5p2−25p+20=5(p2−5p+4)
=5[p2−4p−p+4]
=5[p(p−1)−4(p−1)]
=5[(p−1)(p−4)]
∴ (5p2−25p+20)÷(p−1)=(p−1)5(p−1)(p−4)
=5(p−4).
∴(5p2−25p+20)÷(p−1)=5(p−4).
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