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## Emily778 Group Title WHAT IS THE SOLUTION to 2x^2+x+2=0? 11 months ago 11 months ago

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1. Emily778

by adding them both together.

2. Emily778

umm, hello?

3. dvada191

it has imaginary roots

4. dvada191

$x=-0.25\pm 0.968i$

5. phi

For this problem, you should use the quadratic formula see http://www.khanacademy.org/math/trigonometry/polynomial_and_rational/quad_formula_tutorial/v/using-the-quadratic-formula for how to do it. You will get a minus number inside a square root, which means a complex number.

6. Emily778

isn't the answer x=-1+isqrt15/2?

7. phi

almost, the bottom should be 2*a = 4 $x= \frac{-1 ± \sqrt{15} \ i}{4}$