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Question
The conjugate of the surd 2 - 3√5 is _______.
The conjugate of the surd 2 - 3√5 is _______.
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Solution
The correct option is B 2 + 3√5
The conjugate pair of 2 - 3√5 is 2 + 3√5.
On multipltiplying these, we get
(2−3√5)(2+3√5)=(2)2−(3√5)2=4−45=−41,
, which is a rational number.
The conjugate pair of 2 - 3√5 is 2 + 3√5.
On multipltiplying these, we get
(2−3√5)(2+3√5)=(2)2−(3√5)2=4−45=−41,
, which is a rational number.
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