Question

Please help with this

Answer 1

A. x = 5, -3

Explanation:

The quadratic equation/formula is:

`x = (-b+- √(b^2 - 4ac) )/(2a)`

The setup is:

`ax^2+bx+c=0`

`4x^2 - 8x -60=0`

Plug in the numbers according to the letter associated:

`x = (8+-√(-8^2-4(4)(-60)) )/(2(4))`

`x = (8+-√(1024) )/(8)`

`x = (8+-32)/(8)`

Solve for addition and subtraction:

`x = (8+32)/(8)`
`x = (8-32)/(8)`

`x = (40)/(8)`
`x = (-24)/(8)`

x = 5 x = -3