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प्रश्न
Expand −2p(5p2 – 3p + 7)
उत्तर
−2p(5p2 − 3p + 7) = (−2p) (5p2) + (−2p) (−3p) + (−2p) (7)
= [(−) (+) (2 × 5) (p × p2)] + [(−) (−) (2 × 3) (p × p)] + [(−) (+) (2 × 7)p]
= −10p3 + 6p2 – 14p
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