It was used to see how your basic math skills
Answer:
C 9i
D -9i
Step-by-step explanation:
sqrt(-81)
sqrt(81) sqrt(-1)
we know that sqrt(-1) = i
±9i
<span>The factors of 36 are 36, 18, 12, 9, 6, 4, 3, 2, 1.
<span>The factors of 90 are 90, 45, 30, 18, 15, 10, 9, 6, 5, 3, 2, 1.</span></span>
