Question

• गुणनखण्ड ज्ञात कीजिए : 45a3b +5ab3-30a2b2.
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Answer 1

45a^3b + 5ab^3 - 30a^2b^2

5ab (9a^2 + b^2 - 6ab)

5ab({ underoot 9 a}^2 +b^2 - uderoot 9 × 2 × b )

use (a-b)^2 = a^2 + b^2 -2ab

5ab ( underoot 9 a- b)^2

5ab ( 3a -b)^2