Factor x^2+4x-21

Factor x^2+4x-21
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.
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Name

Name one billion twenty-nine million seven hundred thirty-three thousand six hundred eighty-nine

Interesting facts

  • 1029733689 has 4 divisors, whose sum is 1372978256
  • The reverse of 1029733689 is 9863379201
  • Previous prime number is 3

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 10
  • Sum of Digits 48
  • Digital Root 3

Name

Name one hundred thirty-eight million six hundred forty thousand ninety-six

Interesting facts

  • 138640096 has 128 divisors, whose sum is 1203199920
  • The reverse of 138640096 is 690046831
  • Previous prime number is 7

Basic properties

  • Is Prime? no
  • Number parity even
  • Number length 9
  • Sum of Digits 37
  • Digital Root 1

Name

Name four hundred eighteen million forty-three thousand two hundred forty-six

Interesting facts

  • 418043246 has 16 divisors, whose sum is 648777600
  • The reverse of 418043246 is 642340814
  • Previous prime number is 449

Basic properties

  • Is Prime? no
  • Number parity even
  • Number length 9
  • Sum of Digits 32
  • Digital Root 5