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Simplify 5\(\sqrt{18}\) - 3\(\sqrt{72}\) + 4\(\sqrt{50}\)

Mathematics
JAMB 1992

Simplify 5\(\sqrt{18}\) - 3\(\sqrt{72}\) + 4\(\sqrt{50}\)

  • A. 17\(\sqrt{4}\)
  • B. 4\(\sqrt{17}\)
  • C. 17\(\sqrt{2}\)
  • D. 12\(\sqrt{4}\)
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Correct Answer: Option C
Explanation

5\(\sqrt{18}\) - 3\(\sqrt{72}\) + 4\(\sqrt{50}\) = 5(3\(\sqrt{2}\)) - 3(6\(\sqrt{2}\)) + 4(5\(\sqrt{2}\))

15\(\sqrt{2}\) - 18\(\sqrt{2}\) + 20\(\sqrt{2}\) = 35\(\sqrt{2}\) - 18\(\sqrt{2}\)

= 17\(\sqrt{2}\)


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