-16
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When you times 2 positive numbers together, you get a positive answer. When you times 2 negative numbers together, you get a positive answer. When you times a positive number and a negative number, you get a negative answer. (e.g. -2 x 4 is the same as -2 + -2 + -2 + -2, which is the same as -2 - 2 - 2 - 2 = -8)
a negative times a positive is a negative so 2*-4=-8+10=2
-6
-8. Because whenever you are times-ing or dividing negatives and positives; + times - will always be negative. - times - will always be positive. Obviously, + times + will always be positive. - Dividing is the same thing.
The cube of a negative number is negative. Negative times negative is positive, but then you have the third multiplication, and positive times negative is negative. So for example (-2)3 = -8.