# Factor x^4-81

Factor x^4-81
Rewrite as .
Rewrite as .
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Simplify.
Rewrite as .
Factor.
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Remove unnecessary parentheses.
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### Name

Name one billion two hundred ninety-two million two hundred sixty-eight thousand two hundred sixty-six

### Interesting facts

• 1292268266 has 8 divisors, whose sum is 1952348160
• The reverse of 1292268266 is 6628622921
• Previous prime number is 139

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 44
• Digital Root 8

### Name

Name six hundred eighty-three million nine hundred ninety-six thousand seven hundred twenty

### Interesting facts

• 683996720 has 64 divisors, whose sum is 3525696720
• The reverse of 683996720 is 027699386
• Previous prime number is 55

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 50
• Digital Root 5

### Name

Name one billion two hundred eighty-seven million eight hundred fourteen thousand nine hundred sixty

### Interesting facts

• 1287814960 has 128 divisors, whose sum is 7832247696
• The reverse of 1287814960 is 0694187821
• Previous prime number is 941

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 46
• Digital Root 1