Answer:
Step-by-step explanation:
The first questions are answered on the attachment.
6 after you calculated it
Answer:
x = 0, -4 and -3.
Step-by-step explanation:
The given expression is "3x to the power of 3 + 21x squared + 36x = 0".
We can write this expression as follows :

Taking 3x common.

x = 3

Hence, the solution of the given quadratic equation are x = 0, -4 and -3.
1,725 is you answer because you growth rate is 172.5 a year x ten is 1725