Note: remember to show all of the steps that you use to solve the problem. you can use the comments field to explain your work. your teacher will review each step of your response to ensure you receive proper credit for your answer.

find all the zeroes of the equation.

–3x4+ 27x2 + 1200 = 0

Values of x are 4i, -4i, 5 and -5

Step-by-step explanation:

We need to find all the zeros (roots) of the above equation.

Let assume that x^4 = u^2 and x^2 = u

Putting values of x^4 and x^2 in the above equation and finding the value of u.

So, values of u are -16 and 25

Putting back the value of u i.e, x^2

x^2 = -16 and x^2 =25

solving

Taking square root on both sides:

√x^2 =√-16 and √x^2 = √25

x = ± 4i (as √-1 =i) and x = ±5

So, values of x are 4i, -4i, 5 and -5.

c.)

step-by-step explanation: