Identify Equation Type: Identify the type of equation.The given equation x2+x+2=0 is a quadratic equation in the standard form ax2+bx+c=0, where a=1, b=1, and c=2.
Apply Quadratic Formula: Apply the quadratic formula to find the solutions.The quadratic formula is x=2a−b±b2−4ac. For our equation, a=1, b=1, and c=2.
Calculate Discriminant: Calculate the discriminant.The discriminant is the part of the quadratic formula under the square root: b2−4ac. Let's calculate it: (1)2−4(1)(2)=1−8=−7.
Determine Root Nature: Determine the nature of the roots.Since the discriminant is negative −7, the equation has two complex solutions.
Calculate Solutions: Calculate the solutions using the quadratic formula. x=2⋅1−1±−7=2−1±i7, where i is the imaginary unit.
Write Final Solutions: Write the final solutions.The solutions to the equation x2+x+2=0 are x=(−1+i7)/2 and x=(−1−i7)/2.
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