Simplify 1/(2-i)

Simplify 1/(2-i)
Multiply the numerator and denominator of by the conjugate of to make the denominator real.
Multiply.
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Combine.
Multiply by .
Simplify the denominator.
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Expand using the FOIL Method.
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Apply the distributive property.
Apply the distributive property.
Apply the distributive property.
Simplify.
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Multiply by .
Multiply by .
Raise to the power of .
Raise to the power of .
Use the power rule to combine exponents.
Add and .
Subtract from .
Add and .
Simplify each term.
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Rewrite as .
Multiply by .
Add and .
Split the fraction into two fractions.
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Name

Name seven hundred twenty-nine million nine hundred twenty-nine thousand thirty-eight

Interesting facts

  • 729929038 has 32 divisors, whose sum is 1158561792
  • The reverse of 729929038 is 830929927
  • Previous prime number is 191

Basic properties

  • Is Prime? no
  • Number parity even
  • Number length 9
  • Sum of Digits 49
  • Digital Root 4

Name

Name one billion eight hundred fifty-one million six hundred eighty-eight thousand eight hundred seventy-three

Interesting facts

  • 1851688873 has 8 divisors, whose sum is 1879718400
  • The reverse of 1851688873 is 3788861581
  • Previous prime number is 719

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 10
  • Sum of Digits 55
  • Digital Root 1

Name

Name one hundred twenty million nine hundred sixty-eight thousand two hundred sixty-five

Interesting facts

  • 120968265 has 16 divisors, whose sum is 211144896
  • The reverse of 120968265 is 562869021
  • Previous prime number is 11

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 9
  • Sum of Digits 39
  • Digital Root 3