Question 2c of 40
simplify the following expression:
(i-3)+6i-3(8-i)
choice
21+ 7i
14+6i
-27 + 10i
d.
8+4i

C.

Step-by-step explanation:

The expression is:

Distribute -3 inside the bracket. This gives,

Now, we combine the like terms and simplify. This gives,

Therefore, is equal to .

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)