What is #3 * -5 * -7#?

1 Answer
Jim G.
Oct 8, 2016

105

Explanation:

This is a #color(blue)"multiplication"# problem.

What we have here is.

#3xx(-5)xx(-7)#

We need to know the facts about multiplication of integers.

That is.

# •"positive "xx" positive"="positive"#

#• "negative" xx "negative"="positive"#

#• "negative" xx "positive"="negative"#

#• "positive" xx "negative" ="negative"#

Using these facts on the problem.

#3xx-5=-15larr" first pair of numbers"#

Now #-15xx-7=105larr" complete product"#

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