(-4) x (-2) = 8
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i use integers in real life by checking the temepture, and even your health in video games or anything as long as it has a whole number in. So getting payed for a job, or buying something. You could also use it to count how many pages in a book, or tell time.
All integers are rational numbers. There are integers with an i behind them that are imaginary numbers. They are not real numbers but they are rational. The square root of 2 is irrational. It is real but irrational.
(4x-6)(4x+3)
Some examples of zero integers are 0, -0, +0. Zero is considered an integer because it is a whole number and can be represented on the number line.
Total water displaced by a ship is equal to the Weight of the ship is a live example