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Emily778 Group TitleBest ResponseYou've already chosen the best response.0
by adding them both together.
 8 months ago

Emily778 Group TitleBest ResponseYou've already chosen the best response.0
umm, hello?
 8 months ago

dvada191 Group TitleBest ResponseYou've already chosen the best response.0
it has imaginary roots
 8 months ago

dvada191 Group TitleBest ResponseYou've already chosen the best response.0
\[x=0.25\pm 0.968i\]
 8 months ago

phi Group TitleBest ResponseYou've already chosen the best response.1
For this problem, you should use the quadratic formula see http://www.khanacademy.org/math/trigonometry/polynomial_and_rational/quad_formula_tutorial/v/usingthequadraticformula for how to do it. You will get a minus number inside a square root, which means a complex number.
 8 months ago

Emily778 Group TitleBest ResponseYou've already chosen the best response.0
isn't the answer x=1+isqrt15/2?
 8 months ago

phi Group TitleBest ResponseYou've already chosen the best response.1
almost, the bottom should be 2*a = 4 \[ x= \frac{1 ± \sqrt{15} \ i}{4} \]
 8 months ago
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