To solve the equation \( 5x^2 - 40x = 0 \) by factoring out the greatest common factor, we first identify the GCF of the two terms.
The terms are \( 5x^2 \) and \( -40x \). The GCF is \( 5x \).
We can factor out \( 5x \) from the equation:
\[ 5x(x - 8) = 0 \]
Now, using the zero product property, we can set each factor equal to zero:
- \( 5x = 0 \)
- \( x - 8 = 0 \)
Solving these equations gives:
- \( x = 0 \)
- \( x = 8 \)
Thus, the solutions are:
\[ x = 0 \quad \text{and} \quad x = 8 \]
So the final answer is:
- \( x = 0 \)
- \( x = 8 \)