What monomial should replace ? in ? × 3ab = 15a^2b^3?

5ab^2. Number: 15 ÷ 3 = 5. Powers: a needs 2 - 1 = 1, b needs 3 - 1 = 2. So 5ab^2. Check: 5ab^2 × 3ab = 15a^2b^3.

What monomial should replace ? in $? \times 3 ab = 15 a^{2} b^{3}$ ?

Class 8Multiplying PolynomialsAlgebra

Number:

15 \div 3 = 5

. Powers: a needs

2 - 1 = 1, b

needs

3 - 1 = 2

. So

5 a b^{2}

. Check:

5 a b^{2} \times 3 ab = 15 a^{2} b^{3}

Answer: B)

5 a b^{2}

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