# 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 one billion four hundred seventy-five million seven hundred fifty-nine thousand one hundred twenty-five

### Interesting facts

• 1475759125 has 32 divisors, whose sum is 1897459200
• The reverse of 1475759125 is 5219575741
• Previous prime number is 41

### Basic properties

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

### Name

Name one billion two hundred eighty-nine million four hundred six thousand fifty-seven

### Interesting facts

• 1289406057 has 8 divisors, whose sum is 1719710976
• The reverse of 1289406057 is 7506049821
• Previous prime number is 3517

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 42
• Digital Root 6

### Name

Name one hundred seventy-eight million two hundred seventy-two thousand eight hundred seven

### Interesting facts

• 178272807 has 8 divisors, whose sum is 180974736
• The reverse of 178272807 is 708272871
• Previous prime number is 107

### Basic properties

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