Question

What is the range for y=x^2-7x-8 ?

Answer 1

[-20.25;+∞).

Explanation:

1) according to the properties of the given parabola the minimum is:

`x_0=-(-7)/(2)=3.5; \ y_0=-20.25;`

2) y₀=-20.25 means, the value -20.25 is minimum of the range, the maximum →+∞;

3) finally, the range y≥-20.25.