Q3:Simplify the following radical expression:
Q4: Simplify (by rationalizing the denominator) :
Q6: Simplify the following expression and evaluate it at x = -1, y = -2
Q3:Simplify the following radical expression:
Q4: Simplify (by rationalizing the denominator) :
Q6: Simplify the following expression and evaluate it at x = -1, y = -2