It is due to the way in which a calculator does its calculations. Most calculators follow BIDMAS which stands for; brackets, indices, division, multiplication, addition and subtraction. Since indices are calculated before subtraction, the number will be squared before it is recognised as being negative.
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You multiply the number together - using a calculator if needed.
I am glad you asked, I had some homework on positive and negative numbers and needed info, the countries that use these kind of numbers are definitely USA and the UK.
Yes, but they are imaginary - but are needed in many mathematical calculations. The square root of negative 1 is indicated as the letter "i".
No. Inventory and engineering work need negative numbers to measure. Also, how can we measure the temperature if it's freezing cold without negative numbers? Integers are needed for calculations and measurements in this world.
M =1000 But when brackets and superscripts are added to this numeral larger numbers can be expressed: (M)M = 1000*1000*1000 = 1,000,000,000 which is one billion. If needed even larger numbers can be expressed by this method.