Question

What is the quadratic formula for `x^2-7x-6=0`?

Answer 1

`x=7.53` and `x=-0.53`

Explanation:

The quadratic formula is:

`x=(-b^+-sqrt(b^2-4ac))/(2a)`

The coefficient for `a=1`, `b=-7` and `c=-6`. Substitute these values in to the quadratic formula:

`x=(-(-7)+sqrt((-7)^2-4*1*(-4)))/(2*1)`
`x=(-(-7)-sqrt((-7)^2-4*1*(-4)))/(2*1)`

Solutions:

`x=7.53`
`x=-0.53`