If a^2 + 4b^2 = -4ab, then what will be a : b?

Ratio and Proportion Practice Test 3

Question : 38 of 40

Marks: +1, -0

a^2 + 4b^2 = -4ab

, then what will be a : b?

Solution:

a^2 + 4b^2 = -4ab

a^2 + 4ab^2 + 4b^2 = 0

(a + 2b)^2 = 0

a + 2b = 0

a = 2b

∴a/b=2/1

a : b = 2 : 1

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