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

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

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

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

phi Group TitleBest ResponseYou've already chosen the best response.2
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.
 one year ago

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

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