Question
Find the roots
x1=21−27i,x2=21+27i
Alternative Form
x1≈0.5−1.322876i,x2≈0.5+1.322876i
Evaluate
x2−x+2
To find the roots of the expression,set the expression equal to 0
x2−x+2=0
Substitute a=1,b=−1 and c=2 into the quadratic formula x=2a−b±b2−4ac
x=21±(−1)2−4×2
Simplify the expression
More Steps

Evaluate
(−1)2−4×2
Evaluate the power
1−4×2
Multiply the numbers
1−8
Subtract the numbers
−7
x=21±−7
Simplify the radical expression
More Steps

Evaluate
−7
Evaluate the power
7×−1
Evaluate the power
7×i
x=21±7×i
Separate the equation into 2 possible cases
x=21+7×ix=21−7×i
Simplify the expression
x=21+27ix=21−7×i
Simplify the expression
x=21+27ix=21−27i
Solution
x1=21−27i,x2=21+27i
Alternative Form
x1≈0.5−1.322876i,x2≈0.5+1.322876i
Show Solution
