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What is the following sum? Assume.. (look at picture)

What is the following sum? Assume.. (look at picture)-example-1

1 Answer

3 votes

ANSWER

The correct answer is B

Step-by-step explanation

The given sum is


\sqrt{ {x}^(2) {y}^(3) } + 2 \sqrt{ {x}^(3) {y}^(4) } + xy √(y)

We need to remove the perfect squares.


\sqrt{ {x}^(2) * {y}^(2) * y } + 2 \sqrt{ {x}^(2) * ( {y}^(2))^(2) * x } + xy √(y)

Let us split the radical sign for the factors to get;


\sqrt{ {x}^(2)} * \sqrt{ {y}^(2)} * √(y) + 2 \sqrt{ {x}^(2) } * \sqrt{( {y}^(2))^(2)} * √(x) + xy √(y)

This simplifies to


xy √(y) + 2x {y}^(2) √(x) + xy √(y)

Group similar terms to get:


xy√(y) + xy √(y) + 2x {y}^(2) √(x)

Combine the similar terms to get:


2xy√(y) + 2x {y}^(2) √(x)

The correct answer is B.

User MrAdib
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