Question
Find the roots
x1=−2−2×i,x2=−2+2×i
Alternative Form
x1≈−2−1.414214i,x2≈−2+1.414214i
Evaluate
x2+4x+6
To find the roots of the expression,set the expression equal to 0
x2+4x+6=0
Substitute a=1,b=4 and c=6 into the quadratic formula x=2a−b±b2−4ac
x=2−4±42−4×6
Simplify the expression
More Steps

Evaluate
42−4×6
Multiply the numbers
42−24
Evaluate the power
16−24
Subtract the numbers
−8
x=2−4±−8
Simplify the radical expression
More Steps

Evaluate
−8
Evaluate the power
8×−1
Evaluate the power
8×i
Evaluate the power
More Steps

Evaluate
8
Write the expression as a product where the root of one of the factors can be evaluated
4×2
Write the number in exponential form with the base of 2
22×2
The root of a product is equal to the product of the roots of each factor
22×2
Reduce the index of the radical and exponent with 2
22
22×i
x=2−4±22×i
Separate the equation into 2 possible cases
x=2−4+22×ix=2−4−22×i
Simplify the expression
More Steps

Evaluate
x=2−4+22×i
Divide the terms
More Steps

Evaluate
2−4+22×i
Rewrite the expression
22(−2+2×i)
Reduce the fraction
−2+2×i
x=−2+2×i
x=−2+2×ix=2−4−22×i
Simplify the expression
More Steps

Evaluate
x=2−4−22×i
Divide the terms
More Steps

Evaluate
2−4−22×i
Rewrite the expression
22(−2−2×i)
Reduce the fraction
−2−2×i
x=−2−2×i
x=−2+2×ix=−2−2×i
Solution
x1=−2−2×i,x2=−2+2×i
Alternative Form
x1≈−2−1.414214i,x2≈−2+1.414214i
Show Solution
