Question

f(x)= 2-3x-5x^2 range=?​

Answer 1

f(x) = - 5x^2 - 3x + 2

For it to produce just real roots, b^2 - 4ac should be greater than or equal to 0.

So, 9 + 40, which is 49, obviously is greater than 0. So, it produces real roots.

Now, by using the quadratic formula, we get the roots as 1.2 and -0.2.

So, the values are 1.2 and -0.2.