To solve the quadratic equation \(5x^2 + 75x = 0\) by factoring, we first identify the greatest common factor (GCF) of the terms.
Both terms \(5x^2\) and \(75x\) have a GCF of \(5x\). We can factor that out:
\[ 5x(x + 15) = 0 \]
Now, we can set each factor equal to zero:
- \(5x = 0\) which gives \(x = 0\)
- \(x + 15 = 0\) which gives \(x = -15\)
Thus, the solutions to the equation are:
\[ x = 0 \quad \text{and} \quad x = -15 \]
So, the correct response is: The solutions are \(x=-15\) and \(x=0\).