# Solve Using the Quadratic Formula x^2-8x+15=0

Solve Using the Quadratic Formula x^2-8x+15=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 .
Subtract from .
Rewrite as .
Pull terms out from under the radical, assuming positive real numbers.
Multiply by .
Simplify .
The final answer is the combination of both solutions.
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### Name

Name two billion one hundred thirty-one million one hundred fifty-seven thousand one hundred seventy-four

### Interesting facts

• 2131157174 has 32 divisors, whose sum is 3274992000
• The reverse of 2131157174 is 4717511312
• Previous prime number is 179

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 32
• Digital Root 5

### Name

Name one billion one hundred eighty-nine million six hundred seventy-seven thousand twenty-seven

### Interesting facts

• 1189677027 has 16 divisors, whose sum is 1765756800
• The reverse of 1189677027 is 7207769811
• Previous prime number is 49

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 48
• Digital Root 3

### Name

Name one billion nine hundred sixty-six million six hundred forty-nine thousand seven hundred thirty-three

### Interesting facts

• 1966649733 has 16 divisors, whose sum is 4661688320
• The reverse of 1966649733 is 3379466691
• Previous prime number is 3

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 54
• Digital Root 9