<u>Note:</u> Putting all those 4 values into the function , <em>whichever value makes the function equal to 0</em>, the <em>corresponding expression would be considered a </em><em>factor</em><em> of the function</em> .
Putting into gives us:
Putting into gives us:
Putting into gives us:
Putting into gives us:
<u>As we can see, only putting in the function gives us a value of 0. So the corresponding expression is a factor of the function.</u>