Question

Use the quadratic formula to solve x² + 9x + 10 = 0.

What are the solutions to the equation?

Answer 1

`-1.30\ and\ -7.70` (2 decimal places)

Explanation:

Quadratic Formula:
`x=(-b\pm √(b^2-4ac))/(2a)`

-----------------------------------------------

`x^2+9x+10=0`

Plug in values:

`x=(-9\pm √(9^2-4\cdot \:1\cdot \:10))/(2\cdot \:1)`

First value of x:

`x=(-9+√(41))/(2)=-1.30` (2 decimal places)

Second value of x:

`x=(-9-√(41))/(2)=-7.70` (2 decimal places)