Question

Question 1 of 10

Answer 1

Answer:

C is correct

Step-by-step explanation:

${x}^{2} = 18 \\ x = \frac{ + }{} \sqrt{18} = \frac{ + }{} \sqrt{9 \times 2} = \\ x = \frac{ + }{} \sqrt{9} \times \sqrt{2} \\ x = \frac{ + }{} 3 \sqrt{2}$