Question

If a=1+√7,find the value of -6/a

Answer 1

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Answer 2

given:
a=1+√7
so,first we rationlise it
-6/1+√7*1-√7/1-√7
-6+6√7/1-7
-6+6√7/-6
thus,the value of -6/a is
1-√7