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I don't understand what my professor is asking. my original question and answer: 15t 2 + 2t+5 = 3t(t 2 +1). Let's call this is equation (1) We'll...
please help me with this. I don't understand what my professor is asking....
my original question and answer:
15t2 + 2t+5 = 3t(t2+1). Let's call this is equation (1)
We'll have: (1) 15t2 + 2t + 5 = 3t3 + 3t
15t2 + 2t + 5 - 3t3 - 3t = 0
-3t3 + 15t2 - t + 5 = 0
(t-5) (-3t2-1) = 0
t -5 = 0 or -3t2-1 =0
t=5 or 3t2+1 = 0 (divide by -1)
Consider 3t2 + 1. We have t2 always greater or equal than 0, so 3t2 must be greater or equal than 0. Therefore, 3t2+1 must be greater than 0. Therefore, there is no value of t for the equation 3t2 + 1.
Overall, there is only one value of t =5 that corrects to the (1) equation.
Her reply:
You are correct that there is only one real number solution of the equation, and that is t = 5. However, the exercise asks for all complex solutions, not just real number solutions.
So please complete the problem by also solving the equation 3t2 + 1 = 0 for the complex number solutions. Thanks!