Evaluate: 2\(\sqrt{28} - 3\sqrt{50} + \sqrt{72}\)
MATHEMATICS
WAEC 2019
Evaluate: 2\(\sqrt{28} - 3\sqrt{50} + \sqrt{72}\)
- A. 4\(\sqrt{7} - 21 \sqrt{2}\)
- B. 4\(\sqrt{7} - 11 \sqrt{2}\)
- C. 4\(\sqrt{7} - 9 \sqrt{2}\)
- strong>D. 4\(\sqrt{7} + \sqrt{2}\)
Correct Answer: C. 4\(\sqrt{7} - 9 \sqrt{2}\)
Explanation
2\(\sqrt{28} - 3\sqrt{50} + \sqrt{22}\)
4\(\sqrt{7} - 15\sqrt{2} + 6\sqrt{2}\)
6\(\sqrt{7} - 9\sqrt{2}\)
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