Find all the 0's of this equation
-3x^4+27x^2+1200=0

The zeroes of the equation 4i,-4i,5,-5

Explanation:

Given:

To Find:

The  0's of the equation=?

Solution:

We can  write the equation by taking minus sign common from left hand side and the equation will become  

Now, Let

And put the value of in the above equation and then we will get

Now take 3 common from left hand side of the equation  So equation would become

hence the roots are t= -16 and 25

Now that we know the value(s) of  t , we can calculate  x  since  x  is  

Since we are speaking 2nd root, each of the two imaginary solutions of has 2 roots

x=

x=

Hence the roots are 4i,-4i,5,-5

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5