\(4\sqrt{63} + 5\sqrt{7} - 9\sqrt{28} = ?\) – McqOptions

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1.	\(4\sqrt{63} + 5\sqrt{7} - 9\sqrt{28} = ?\)
A.	\(2 \sqrt{7}\)
B.	\(- \sqrt{7}\)
C.	\( \sqrt{14}\)
D.	\( \sqrt{21}\)
Answer» C. \( \sqrt{14}\)

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