It seems that $ 3t^{2}+8t-125 $ cannot be factored out.
Step 1: Identify constants $ a $ , $ b $ and $ c $.
$ a $ is a number in front of the $ x^2 $ term $ b $ is a number in front of the $ x $ term and $ c $ is a constant. In this case:
Step 2: Multiply the leading coefficient $\color{blue}{ a = 3 }$ by the constant term $\color{blue}{c = -125} $.
$$ a \cdot c = -375 $$Step 3: Find out two numbers that multiply to $ a \cdot c = -375 $ and add to $ b = 8 $.
Step 4: All pairs of numbers with a product of $ -375 $ are:
PRODUCT = -375 | |
-1 375 | 1 -375 |
-3 125 | 3 -125 |
-5 75 | 5 -75 |
-15 25 | 15 -25 |
Step 5: Find out which factor pair sums up to $\color{blue}{ b = 8 }$
Step 6: Because none of these pairs will give us a sum of $ \color{blue}{ 8 }$, we conclude the polynomial cannot be factored.