Please check the solution
2x^2+3x-3=0
x=(-3 plus/minus $\displaystyle \sqrt {33} $)/4
x=-2.185 and x=0.685
Is this correct? Is there a better way to solve it?
Thank you
ok, the slope of the secant line of a function $\displaystyle f(x)$ between the points $\displaystyle x = a$ and $\displaystyle x = b$ is given by:
$\displaystyle \frac {f(b) - f(a)}{b - a}$
(this is just the formula for the slope of the straight line connecting the two points. note its similarity to $\displaystyle \frac {y_2 - y_1}{x_2 - x_1}$)