Question

In the following equation, identify the x-intercepts in the graph `y = 3x^2 + 19x – 40`?

Answer 1

I found:
`x=-8,y=0`
`x=5/3, y=0`

Explanation:

You can set `y=` and solve the equation:
`3x^2+19x-40=0` using the Quadratic Formula to get:
`x_(1,2)=(-19+-sqrt(361+480))/6=(-19+-29)/6`
so you get two solutions:
`x_1=-8`
`x_2=-10/6=5/3`