ADVANCED EXERCISES-Square Roots and Other Radicals
(2)
Rationalize each expression.
HINT:
The conjugate is
for question (a), and the conjugate for question (b) is
. Then expand only the product of the numerator and the conjugate. You should be able to simplify after expanding.
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for question (a), and the conjugate for question (b) is 
. Then expand only the product of the numerator and the conjugate. You should be able to simplify after expanding.