Find Approximate Solution

**sologuitar** · December 4th 2009, 05:31 PM

Use your calculator to find the approximate solution of the given equation.

8.06x^2 + 25.8726x - 25.047256 = 0

**lvleph** · December 4th 2009, 05:48 PM

Depending on the calculator, there is a poly button or a solve button.

**HallsofIvy** · December 5th 2009, 03:53 AM

If your calculator does not have those, use the "quadratic formula":
The solutions to $ax^2+ bx+ c= 0$ are given by
$x= \frac{-b\pm\sqrt{b^2- 4ac}}{2a}$ .

**sologuitar** · December 5th 2009, 05:27 AM

Originally Posted by HallsofIvy

If your calculator does not have those, use the "quadratic formula":
The solutions to $ax^2+ bx+ c= 0$ are given by
$x= \frac{-b\pm\sqrt{b^2- 4ac}}{2a}$ .

I had no idea that I could plug that weird-looking equation into the quadratic formula. How about that?

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