Question

How do you use the quadratic formula to solve `-2.8x=-3.8x^2+1.4`?

Answer 1

`x=1.0785,-0.3416`

Explanation:

Re-arrange the formula
`3.8x^2-2.8x-1.4=0`

This is the `ax^2+bx+c=0` format,
so `a=3.8, b=-2.8, and c=-1.4`

The quadratic equation is `(-b+-sqrt(b^2-4ac))/(2a)`

Plug in the data:`(-(-2.8)+-sqrt((-2.8)^2-4*(3.8)*(-1.4)))/(2(3.8))`