Q3 Simplify the radical expression. √640 x^3 y^4

Q4 Simplify the radical expression. 4√2 + 6√2

Q5 Simplify the radical expression. 3√5 + 6√180

Q3: √640 x^3 y^4 = 8xy^2√10

Q4: 4√2 + 6√2 = 10√2

Q5: 3√5 + 6√180 = 3√5 + 36√5 = 39√5