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if m:n = 2:1, evaluate (3m^{2} - 2n^{2})/(m^{2} + mn)

A. 4/3

B. 5/3

C. 3/4

D. 3/5

**Comments**

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m:n = 2:1

m = 2

n = 1

Numerator = 3m^{2} - 2n^{2}

= 3(2)^{2} - 2(1)^{2}

= 3(4) - 2(1)

- 12 - 2

= 10

Denominator = m^{2} + mn

= 2^{2} + 2x1

= 4 + 2

= 6

Numerator/denominator

= 10/6

= 5/3

**Ans B**

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