Question

Simplify sqr 18
A 2 sqr 3
B 2 sqr 9
C 3 sqr 2
D 9 sqr 2

Answer 1

C. 3√2

Explanation:

√18

= √(9 x 2)

= √9 x √2

= 3√2

Answer 2

`\bf √(18)~~ \begin{cases} 18=&2\cdot 3\cdot 3\\ &2\cdot 3^2 \end{cases}\implies √(2\cdot 3^2)\implies 3√(2)`