To factor the expression \(-60 + 100\), we can first simplify it:
\[ -60 + 100 = 40 \]
Now, we can express \(40\) in the form \(a(b+c)\) or \(a(b-c)\). One approach is to find a common factor. We can see that \(40\) can be expressed as:
\[ 40 = 20 \cdot 2 \]
Here, \(a = 20\), \(b = 0\), and \(c = 2\). However, to maintain a clearer factorization, we can also express it as:
\[ 40 = 40(1) \]
Thus, here \(a = 40\), \(b = 0\), and \(c = 1\).
Since we are aiming for a more standard presentation, we note that \(40\) could also be factored as:
\[ 40 = 20(2) \]
Thus, the factorization could be presented as:
\[ \text{Answer: } 20(2) \text{ or } 40(1) \]
So the expression can be thought of as \(20(2)\) or simply as \(40(1)\).