Question

Efetue: A) √72-√12 = B) √3 x √27 =

Answer 1

a)

= √72 - √12
= √36.√2 - √4.√3
= 6√2 - 2√3
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)

= √3 . √27
= √3.√3.√9
= 3.3
= 9