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सिद्ध कीजिए कि (x – 3) व (x + 4) बहुपद x2 + x – 12 के गुणनखण्ड हैं।

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बहुपद x2 + x – 12 के गुणनखण्ड (x – 3) तथा (x + 4) होंगे।

यदि x – 3 = 0 या x = 3 रखने पर शेषफल = (3)2 + 3 – 12 = 9 + 3 – 12 = 0

यदि x + 4 = 0 या x = -4 रखने पर शेषफल = (-4)2 – 4 – 12 = 16 – 16 = 0

∴ (x – 3) व (x + 4) बहुपद x2 + x – 12 के गुणनखण्ड हैं।

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