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If m:n = 2:1, evaluate (3m2 - 2n2)/(m2 + mn) A. 4/3 B. 5/3...
waec-2019 ssce-exam-2019 waec-mathematics-2019 math
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if m:n = 2:1, evaluate (3m2 - 2n2)/(m2 + mn)

A. 4/3

B. 5/3

C. 3/4

D. 3/5

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peter
Asked by peterrep:1.6K
University of Lagos Nigeria
03 May 2020

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1 answer(s)


judziy
Judziy answeredrep:1.8K
University of Benin Nigeria
31 August 2020
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m:n = 2:1

m = 2

n = 1

Numerator = 3m2 - 2n2

 = 3(2)2 - 2(1)2

= 3(4) - 2(1)

- 12 - 2

= 10

Denominator = m2 + mn

= 22 + 2x1

= 4 + 2

= 6

Numerator/denominator

= 10/6

= 5/3

Ans B

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