Multiply, and Then Simplify If Possible $( \sqrt { 7 } + \sqrt { 3 } ) ^ { 2 }$

question 285

Multiple Choice

Multiply, and then simplify if possible. Assume all variables represent positive real numbers.
- $( \sqrt { 7 } + \sqrt { 3 } ) ^ { 2 }$

• A) \(10 - 2 \sqrt { 21 }\)
• B) \(21 + 2 \sqrt { 21 }\)
• C) \(4 + 2 \sqrt { 21 }\)
• D) \(10 + 2 \sqrt { 21 }\)

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The difference between the sales revenue of a product and its variable costs, used to cover fixed costs and profit.

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