# Solve by Factoring x^2+3x-28=0

Solve by Factoring x^2+3x-28=0
Factor using the AC method.
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.
Set the first factor equal to .
Add to both sides of the equation.
Set the next factor equal to and solve.
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 hundred ninety-eight million six hundred sixty-one thousand five hundred twenty

### Interesting facts

• 198661520 has 128 divisors, whose sum is 1214632584
• The reverse of 198661520 is 025166891
• Previous prime number is 15817

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 38
• Digital Root 2

### Name

Name one billion nine hundred twenty-five million eight hundred eight thousand seven hundred ninety-six

### Interesting facts

• 1925808796 has 16 divisors, whose sum is 4404104280
• The reverse of 1925808796 is 6978085291
• Previous prime number is 61

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 55
• Digital Root 1

### Name

Name one billion one hundred fourteen million three hundred four thousand ninety-four

### Interesting facts

• 1114304094 has 8 divisors, whose sum is 1733362008
• The reverse of 1114304094 is 4904034111
• Previous prime number is 27

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 27
• Digital Root 9