Use the quadratic formula to find the solutions.

Substitute the values <math><mstyle displaystyle="true"><mi>a</mi><mo>=</mo><mn>1</mn></mstyle></math> , <math><mstyle displaystyle="true"><mi>b</mi><mo>=</mo><mo>-</mo><mn>4</mn></mstyle></math> , and <math><mstyle displaystyle="true"><mi>c</mi><mo>=</mo><mo>-</mo><mn>5</mn></mstyle></math> into the quadratic formula and solve for <math><mstyle displaystyle="true"><mi>x</mi></mstyle></math> .

Simplify the numerator.

Raise <math><mstyle displaystyle="true"><mo>-</mo><mn>4</mn></mstyle></math> to the power of <math><mstyle displaystyle="true"><mn>2</mn></mstyle></math> .

Multiply <math><mstyle displaystyle="true"><mo>-</mo><mn>4</mn></mstyle></math> by <math><mstyle displaystyle="true"><mn>1</mn></mstyle></math> .

Multiply <math><mstyle displaystyle="true"><mo>-</mo><mn>4</mn></mstyle></math> by <math><mstyle displaystyle="true"><mo>-</mo><mn>5</mn></mstyle></math> .

Add <math><mstyle displaystyle="true"><mn>16</mn></mstyle></math> and <math><mstyle displaystyle="true"><mn>20</mn></mstyle></math> .

Rewrite <math><mstyle displaystyle="true"><mn>36</mn></mstyle></math> as <math><mstyle displaystyle="true"><msup><mrow><mn>6</mn></mrow><mrow><mn>2</mn></mrow></msup></mstyle></math> .

Pull terms out from under the radical, assuming positive real numbers.

Multiply <math><mstyle displaystyle="true"><mn>2</mn></mstyle></math> by <math><mstyle displaystyle="true"><mn>1</mn></mstyle></math> .

Simplify <math><mstyle displaystyle="true"><mfrac><mrow><mn>4</mn><mo>±</mo><mn>6</mn></mrow><mrow><mn>2</mn></mrow></mfrac></mstyle></math> .

The final answer is the combination of both solutions.

Do you know how to Solve Using the Quadratic Formula x^2-4x-5=0? If not, you can write to our math experts in our application. The best solution for your task you can find above on this page.

Name | one billion two hundred thirty-four million nine hundred twenty thousand five hundred twenty-six |
---|

- 1234920526 has 32 divisors, whose sum is
**2236151808** - The reverse of 1234920526 is
**6250294321** - Previous prime number is
**43**

- Is Prime? no
- Number parity even
- Number length 10
- Sum of Digits 34
- Digital Root 7

Name | one billion twenty-four million four hundred fifty-one thousand three hundred two |
---|

- 1024451302 has 32 divisors, whose sum is
**1782144000** - The reverse of 1024451302 is
**2031544201** - Previous prime number is
**883**

- Is Prime? no
- Number parity even
- Number length 10
- Sum of Digits 22
- Digital Root 4

Name | twenty-five million one hundred sixty-nine thousand one hundred eighty-five |
---|

- 25169185 has 4 divisors, whose sum is
**30203028** - The reverse of 25169185 is
**58196152** - Previous prime number is
**5**

- Is Prime? no
- Number parity odd
- Number length 8
- Sum of Digits 37
- Digital Root 1