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Arithmetic Aptitude :: Square Root and Cube Root

1. In the polynomial f(x) =2*x^4 - 49*x^2 +54, what is the product of the roots, and what is the sum of the roots (Note that x^n denotes the x raised to the power n, or x multiplied by itself n times)?

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Answer: Option A

Explanation:

Here is no explanation for this answer

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2. If 3√5 + √125 = 17.88, then what will be the value of √80 + 6√5 ?

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Answer: Option D

Explanation:

3√5 + √125 = 17.88

3√5 + √(25 * 5) = 17.88

3√5 + 5√5 = 17.88

8√5 = 17.88

√5 = 2.235

√80 + 6√5 = √(16 * 5) + 6√5

= 4√5 + 6√5

= 10√5 = (10 * 2.235) = 22.35

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