3\sqrt{147}-7/3\sqrt{1/3}+7\sqrt{1/3}=?

RRB Group D 10-Dec-2018 Shift 1 Solved Paper

Question : 53 of 100

Marks: +1, -0

3√{147}-7/3√{1/3}+7√{1/3}=?

Solution:

√^3{147}-7/3√{1/3}+√^7{1/3}

=3√{3×7×7}+(-7/3+7)√{1/3}

=21√3+({14}/3)1/√3

=21√3+({14}/3)×1/√3×√3/√3

=21√3+{14√3}/9=√3(21+{14}/9)

={201}/9√3

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