Solve -a·b: Calculate the Product When a=-3 and b=5

Question

$-a\cdot b=$

Replace and calculate if $a=-3\text{, }b=5$

00:00 Set up and calculate

00:05 Let's substitute appropriate values according to the given data, being careful with parentheses

00:21 Negative times negative is always positive

00:26 Let's calculate the multiplication

00:29 And this is the solution to the question

First, we replace the data in the exercise

-(-3)*5 =

To better understand the minus sign multiplied at the beginning, we will write it like this:

-1*-3*5 =

Now we see that we have an exercise that is all multiplication,

We will solve according to the order of arithmetic operations, from left to right:

-1*-3 = 3

3*5 = 15

$15$