Complex Numbers
What does the square root of -1 equal
i
Solve for the roots.
x^2-49=0
x=7 or x =-7
Solve using the quadratic formula
x^2-5x-14=0
7 and -2
Solve the following equations by completing the square
x ^2 + 6x + 8 = 0
-2 and -4
What is the discriminant of:
a2 + 14a - 51 = 0
400
Simplify the expression.
sqrt(-81)
9i
Solve for the roots.
x2-11x+19=-5
x=3 or x=8
Solve using the quadratic formula
2x^2+2x-12=0
2 and -3
Solve the following equations by completing the square
x ^2 + 14x − 15 = 0
1 and -15
What is the discriminant of:
x2 − 12x + 11 = 0
100
Simplify the expression.
sqrt(-25)
5i
Solve for the roots.
x2-8x+16=0
x=4
Solve using the quadratic formula
x^2-4x+4=0
2
Solve the following equations by completing the square
n^ 2 − 2n − 3 = 0
3 and -1
What does the discriminant of n2 -18n -40= 0
Tell us.
Simplify the expression.
sqrt(-4)+2
2+2i
Solve for the roots.
x2-49=0
x=7 and x=-7
Solve using the quadratic formula
2x^2+3x-20=0
5/2 and -4
Solve the following equations by completing the square
k ^2 − 12k + 23 = 0
6+-\sqrt13
What does the discriminant of x2 − 5x + 18 = 0 Tell us.
It is a complex solution.
Simplify the expression.
sqrt(-9)+sqrt(-4)
5i
Solve for the roots.
n2 − 10n + 22 = −2
x=6 and x=4
Solve using the quadratic formula
2x^ 2 − 7x − 13 = −10
(7+-\sqrt73)/4
Solve the following equations by completing the square
p^ 2 + 14 p − 38 = 0
-7 +- \sqrt87
What does it mean when the discriminant equals 0
There is one real solution