00:01
In order to find the t -interset, we have to have this function in the factored form.
00:06
So we're going to factorize the function, and we take a common factor.
00:10
Here we have 4 t -square as common in all terms.
00:14
So we take 4 -t -square common factor, and then we get t -square plus 3 -t -minus 10, and then we factorize this trinomial.
00:23
So we're going to have c of t equals 4 -t -square, and then we open two parentheses, we put t here, t there, and the signs are different.
00:35
The bigger sign is positive, so positive, the other one is negative.
00:40
And then we have 5 and 2 as their product is 10 and their sum is 3, positive 5 and negative 2...