Question

Rationalize the denominator.

i. 1/(√7 + √2)

ii. 3/(2√5 - 3√2)

iii. 4/(7 + 4√3)

iv. (√5 - √3)/(√5 + √3)

Answer 1

Thus, 1/(√7 + √2) = (√7 - √2)/5

iii. 4/(7 + 4√3)

... [Multiplying the numerator and denominator by (√5 - √3)]