after rationalising the denominator of 5/3√2-2√3, we get
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3.............
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3√2-2√3*3√2+2√3
=(3√2*3√2)-(2√3*2√3)
=(9*2)-(4*3)
=18-12
=6
because in rationalisation we multiply the denominator by itself by changing the middle sign
..if,+ then -,if - then +
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