Simplify 2√7- 14/√7+7/√21
...Simplify 2√7- 14/√7+7/√21
\(\frac{√21}{21}\)
7\(\frac{√21}{21}\)
\(\frac{√21}{3}\)
3√21
Correct answer is C
2√7- 14/√7 +7/√21
L.C.M is √21
\(\frac{√21 * 2√7 - √3 *14 + 7}{√21}\)
=\(\frac{2 * 7√3 - 14√3 + 7}{√21}\)
= \(\frac{14√3 - 14√3 + 7}{√21}\)
=\(\frac{7}{√21}\)
or
\(\frac{7 \times √21}{√21 \times √21}\)
= \(\frac{7 \times √21}{21}\) or \(\frac{√21}{3}\)
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