Complex Numbers
simplify (6i)^3
-216
(- 2 - 4i) / i
-4 + 2i
Evaluate the following expression (3 + 2i) - (8 - 5i)
-5 + 7i
Simplify −1−8i−4−i
-5-9i
Evaluate the following expression (4 - 2i)(1 - 5i)
-6 - 22i
(- 3 + 2i) / (3 - 6i)
-7/15 - 4i/15
If (x + yi) / i = ( 7 + 9i ) , where x and y are real, what is the value of (x + yi)(x - yi)?
130
Rewrite the expression in standard form (2+3i)(1-4i)
2-5i-12i^2
Identify the imaginary number, 9+3i
3i
Solve (1+2i)(4−6i)^2
76 − 88i
Simplify 6(−7 + 6i)(−4 + 2i)
96 − 228i
When solving a quadratic formula and the discriminant is 0, what type of solution will you get?
One real double root solution
When solving a quadratic equation and the discriminant is less than 0, what type of solution will you get?
Two complex solutions
Complex Number
a number of the form a+bi where a and b are real numbers and i is the square root of -1
Simplify (a-bi)(a-bi)
a^2-2abi-bi^2
Find the error. (16-3i)+(4+2i) 20-i^2 20-(-1) 20+1 21
i^2 is positive 1 not negative 1
What is the quadratic formula?
x = (-b ± √b^2 - 4ac)/2a (will get 2 answers)
Solve z^2 + 2z + 2 = 0
−1±i
Solve i(1+7i)−3i(4+2i)
−1−11i
Solve (1−3i)^3
−26 + 18i