# 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 two hundred three million five hundred seventy-six thousand eight hundred ninety-eight

### Interesting facts

• 203576898 has 32 divisors, whose sum is 468679680
• The reverse of 203576898 is 898675302
• Previous prime number is 139

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 48
• Digital Root 3

### Name

Name one billion six hundred forty-three million two hundred twenty-one thousand five hundred sixty-eight

### Interesting facts

• 1643221568 has 256 divisors, whose sum is 19531134720
• The reverse of 1643221568 is 8651223461
• Previous prime number is 23

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 38
• Digital Root 2

### Name

Name five hundred forty-six million eight hundred forty-one thousand five hundred ninety-four

### Interesting facts

• 546841594 has 16 divisors, whose sum is 885427200
• The reverse of 546841594 is 495148645
• Previous prime number is 431

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 46
• Digital Root 1