# 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 .
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 six hundred forty-six million three hundred forty-nine thousand twenty-three

### Interesting facts

• 646349023 has 4 divisors, whose sum is 648110560
• The reverse of 646349023 is 320943646
• Previous prime number is 367

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 37
• Digital Root 1

### Name

Name one billion seven hundred four million nine hundred thirty-four thousand seven hundred seventeen

### Interesting facts

• 1704934717 has 4 divisors, whose sum is 1705112640
• The reverse of 1704934717 is 7174394071
• Previous prime number is 10163

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 43
• Digital Root 7

### Name

Name two billion ninety-nine million one hundred ninety-eight thousand eight hundred

### Interesting facts

• 2099198800 has 64 divisors, whose sum is 11052283788
• The reverse of 2099198800 is 0088919902
• Previous prime number is 25

### Basic properties

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