Step 1: Identify constants $ \color{blue}{ b }$ and $\color{red}{ c }$. ( $ \color{blue}{ b }$ is a number in front of the $ x $ term and $ \color{red}{ c } $ is a constant). In our case:
$$ \color{blue}{ b = 5 } ~ \text{ and } ~ \color{red}{ c = -6 }$$Now we must discover two numbers that sum up to $ \color{blue}{ 5 } $ and multiply to $ \color{red}{ -6 } $.
Step 2: Find out pairs of numbers with a product of $\color{red}{ c = -6 }$.
PRODUCT = -6 | |
-1 6 | 1 -6 |
-2 3 | 2 -3 |
Step 3: Find out which pair sums up to $\color{blue}{ b = 5 }$
PRODUCT = -6 and SUM = 5 | |
-1 6 | 1 -6 |
-2 3 | 2 -3 |
Step 4: Put -1 and 6 into placeholders to get factored form.
$$ \begin{aligned} m^{2}+5m-6 & = (x + \color{orangered}{\square} )(x + \color{orangered}{\square}) \\ m^{2}+5m-6 & = (x -1)(x + 6) \end{aligned} $$