(-5) (-2a-3b)

To simplify the expression \((-5)(-2a - 3b)\), you need to distribute \(-5\) to each term inside the parentheses.

1. Distribute \(-5\) to \(-2a\): \[ -5 \times -2a = 10a \]

2. Distribute \(-5\) to \(-3b\): \[ -5 \times -3b = 15b \]

Now, combine these results: \[ 10a + 15b \]

So, the simplified expression is: \[ 10a + 15b \]