Unit 5

Question 1

The ___ of a complex number a+bi is the complex number a-bi.

Answer 1

conjugate

Question 2

If an inequality contains the less than symbol (<) or greater than symbol (>), its graph would be a ___ line.

Answer 2

dashed

Question 3

If an inequality contains the symbols, ≤ or ≥ it would be graphed as a ___ line.

Answer 3

solid

Question 4

Any value or values for a variable or variables that make an equation or inequality true is called a ___.

Answer 4

solution

Question 5

If the discriminant is ___, a quadratic will have no real number roots and will not intersect the x -axis at all.

Answer 5

negative

Question 6

A(n) ___ number is a number of the form a+bi where a and b are real numbers and i^2 = -1.

Answer 6

complex

Question 7

A ___ is a quantity that has both length and direction.

Answer 7

vector

Question 8

A(n) ___ number is a number of the form bi where b is a real number, and i^2= -1.

Answer 8

imaginary