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गुणनखण्ड प्रमेय के प्रयोग से k का मान ज्ञात कीजिए यदि (x + 2), बहुपद (x + 1)7 + (2x + k)3 का एक गुणनखण्ड है।

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यदि (x + 2), बहुपद (x + 1)7 + (2x + k)3 का एक गुणनखण्ड है तो

x + 2 = 0 या x = 0 – 2 = -2 रखने पर

शेषफल = 0

(-2 + 1)7 + (2 × -2 + k)3 = 0

(-1)7 + (-4 + k)3 = 0

-1 + (-4 + k)3 = 0

(-4 + k)3 = 1

(-4 + k)3 = (1)3

-4 + k = 1

k = 1 + 4 = 5

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