Question

Rationalise the number5-3root11 5+2root11

Answer 1

$(5 - 3 \sqrt{11} )(5 + 2 \sqrt{11)}$

$(2 \sqrt{11})(7 \sqrt{11)}$

$7 \times 2 \times \sqrt{11} \times \sqrt{11}$

$14 \times 11$

$154$

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