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प्रश्न
Expand 3mn(m3n3 – 5m2n + 7mn2)
उत्तर
3mn(m3n3 – 5m2n + 7 mn2) = (3mn) (m3n3) + (3mn) (– 5m3n) + (3mn) (7mn3)
= (3) (m × m3) (n × n3) + (+) (–) (3 × 5) (m × m2) (n × n) + (3 × 7) (m × m) (n × n2)
= 3m4n4 – 15m3n2 + 21m2n3
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