Question

rationalise the denominator of unroot 5/2-root 7​

Answer 1

Answer:

5/(2-√7)

=5/(2-√7) x (2+√7)/(2+√7)

=5(2+√7)/4-7

=(10+5√7)/-3

=(-10-5√7)/3

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Answer 2

Answer:

5/(2-√7)

=5/(2-√7) x (2+√7)/(2+√7)

=5(2+√7)/4-7

=(10+5√7)/-3

=(-10-5√7)/3