Factor \({x}^{2}-8x+15\).
Ask: Which two numbers add up to \(-8\) and multiply to \(15\)?
Rewrite the expression using the above.
\[(x-5)(x-3)\]
Solve for \(x\).
Ask: When will \((x-5)(x-3)\) equal zero?
When \(x-5=0\) or \(x-3=0\)
Solve each of the 2 equations above.
\[x=5,3\]
