Simplify \((\sqrt{0.7} + \sqrt{70})^{2}\)
-
84.7
- 70.7
- 217.7
- 168.7
The correct answer is: A
Explanation
\((\sqrt{0.7} + \sqrt{70})^{2}\)
= \((\sqrt{0.7} + \sqrt{70})(\sqrt{0.7} + \sqrt{70})\)
= \(0.7 + 2\sqrt{0.7 \times 70} + 70\)
= \(0.7 + 14 + 70 \)
= 84.7