Solve by Factoring x^2-4x-5=0

Solve by Factoring x^2-4x-5=0
Factor using the AC method.
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Consider the form . Find a pair of integers whose product is and whose sum is . In this case, whose product is and whose sum is .
Write the factored form using these integers.
If any individual factor on the left side of the equation is equal to , the entire expression will be equal to .
Set the first factor equal to and solve.
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Set the first factor equal to .
Add to both sides of the equation.
Set the next factor equal to and solve.
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Set the next factor equal to .
Subtract from both sides of the equation.
The final solution is all the values that make true.
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Name

Name one billion seven hundred ninety-five million five hundred nineteen thousand one hundred eighty-eight

Interesting facts

  • 1795519188 has 32 divisors, whose sum is 4504797720
  • The reverse of 1795519188 is 8819155971
  • Previous prime number is 281

Basic properties

  • Is Prime? no
  • Number parity even
  • Number length 10
  • Sum of Digits 54
  • Digital Root 9

Name

Name one billion nine hundred fifty-six million eight hundred eighty-five thousand eight hundred one

Interesting facts

  • 1956885801 has 8 divisors, whose sum is 2809887360
  • The reverse of 1956885801 is 1085886591
  • Previous prime number is 13

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 10
  • Sum of Digits 51
  • Digital Root 6

Name

Name one billion seven hundred seventy-eight million seven hundred eight thousand five hundred eighty-five

Interesting facts

  • 1778708585 has 16 divisors, whose sum is 2193816000
  • The reverse of 1778708585 is 5858078771
  • Previous prime number is 5659

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 10
  • Sum of Digits 56
  • Digital Root 2