Do you mean 33? It means 3 to the 3rd power. The little number above tells you how many times you're supposed to multiply the big number with itself. In this case it will be
3*3*3=27
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x+5=3
An exponent. For example: 53 5 is the base number and the little 3 above the five is an exponent. Exponents represent the number of times the base value is multiplied by itself. So the above example shows that 5 is multiplied by itself 3 times: 5 x 5 x 5 = 53 = 125.
Algebra is the basis of maths you can use it to solve unknown terms such as x. For example: 3x - 3 = 0 3x = 3 x = 1
the 2 is the symbol for squared. it means that you multiply that amount of feet by itself, to get square feet. like 3x3=9, or 9= the square of 3, or 3=the square root of 9.