Quadratic equations and complex numbers ppease answer asap

12.

15.

Step-by-step explanation:

12.

To solve this quadratic equation, we will put all the variables and constants on one side of the equation and factorize it.

Therefore, the solutions to the given expression are 3(1/2) and 6.

15.

Squaring both the sides to get:

Therefore, the solution to the given expression is 4.

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

17 1/3

step-by-step explanation: