Solve by Factoring x^2-4x-5=0
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 .
Add to both sides of the equation.
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 eight hundred twenty-four million four hundred seventy-seven thousand five hundred |
|---|
Interesting facts
- 1824477500 has 32 divisors, whose sum is 4965504768
- The reverse of 1824477500 is 0057744281
- Previous prime number is 5
Basic properties
- Is Prime? no
- Number parity even
- Number length 10
- Sum of Digits 38
- Digital Root 2
Name
| Name | one billion five hundred thirty million seven hundred fifty-eight thousand three hundred twenty-seven |
|---|
Interesting facts
- 1530758327 has 8 divisors, whose sum is 1751719200
- The reverse of 1530758327 is 7238570351
- Previous prime number is 769
Basic properties
- Is Prime? no
- Number parity odd
- Number length 10
- Sum of Digits 41
- Digital Root 5
Name
| Name | one billion six hundred sixty-one million two hundred nineteen thousand nine hundred twenty-five |
|---|
Interesting facts
- 1661219925 has 8 divisors, whose sum is 2126361600
- The reverse of 1661219925 is 5299121661
- Previous prime number is 5
Basic properties
- Is Prime? no
- Number parity odd
- Number length 10
- Sum of Digits 42
- Digital Root 6