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Where does pemdas come from?
PEMDAS is an acronym to help you remember the order of operations in mathematical equations.First, you do expressions within Parenthesis and/or Exponents.Then, you do expressions involving Multiplication and/or Division.Finally, you do the expressions involving Addition and/or Subtraction.
What are the example of word problems involving rational expressions?
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What is fourth root of 6 times the fourth root of 6?
Rounded to two decimal places, 61/4 x 61/4 = 2.45. Due to the rules of adding exponents in a multiplication sum involving exponents, this is equal to 6(1/4 + 1/4) or the square root of 6.
How are addition subtraction multiplication and division of real numbers performed?
That really depends how the numbers are expressed - you have to learn separately how to calculate with decimals, with fractions, with expressions involving square roots, etc.
Where can one find a list of trigonometric identities?
Trigonometric identities involve certain functions of one or more angles. These identities are useful whenever expressions involving trigonometric functions need to be simplified.
