Question

Product of 6a² – 7b + 5ab and 2ab is ______.

विकल्प

• 12a³b – 14ab² + 10ab

• 12a³b – 14ab² + 10a²b²

• 6a² – 7b + 7ab

• 12a²b – 7ab² + 10ab

Answer 1

Product of 6a² – 7b + 5ab and 2ab is 12a³b – 14ab² + 10a²b².

Explanation:

Required product = 2ab × (6a² – 7b + 5ab)

This is the product of a trinomial by a monomial, so we multiply monomial with each term of the trinomial.

∴ 2ab × (6a² – 7b + 5ab) = 2ab × 6a² + 2ab(–7b) + 2ab × 5ab

= 12a³b – 14ab² + 10a²b²