# Solve Using the Quadratic Formula x^2+4x-7=0

Solve Using the Quadratic Formula x^2+4x-7=0
Use the quadratic formula to find the solutions.
Substitute the values , , and into the quadratic formula and solve for .
Simplify.
Simplify the numerator.
Raise to the power of .
Multiply by .
Multiply by .
Add and .
Rewrite as .
Factor out of .
Rewrite as .
Pull terms out from under the radical.
Multiply by .
Simplify .
The result can be shown in multiple forms.
Exact Form:
Decimal Form:
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### Name

Name one billion three hundred seventy million six hundred thirty-seven thousand five hundred thirty-nine

### Interesting facts

• 1370637539 has 8 divisors, whose sum is 1374421440
• The reverse of 1370637539 is 9357360731
• Previous prime number is 1019

### Basic properties

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

### Name

Name two hundred fifty-six million three hundred thirty-six thousand seven hundred thirty-seven

### Interesting facts

• 256336737 has 8 divisors, whose sum is 352807680
• The reverse of 256336737 is 737633652
• Previous prime number is 31

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 42
• Digital Root 6

### Name

Name one hundred sixty-nine million two hundred thirty-nine thousand one hundred seventy-two

### Interesting facts

• 169239172 has 32 divisors, whose sum is 388483200
• The reverse of 169239172 is 271932961
• Previous prime number is 139

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 40
• Digital Root 4