AnswersAlgebra IIQuadratics and Complex Numbers

Quadratics and Complex Numbers — Test Answers

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Which statement about the following equation is true? 2 x squared minus 9 x plus 2 is equal to negative 1

A
The discriminant is greater than 0 , so there are two complex roots.
B
The discriminant is less than 0 , so there are two real roots.
C
The discriminant is greater than 0 , so there are two real roots.
D
The discriminant is less than 0 , so there are two complex roots.
23

Using the quadratic formula to solve 4 x squared minus 3 x plus 9 is equal to 2 x plus 1 , what are the values of x ?

A
the fraction with numerator 1 plus or minus square root of 159 i and denominator 8
B
the fraction with numerator 1 plus or minus square root of 153 and denominator 8
C
the fraction with numerator 5 plus or minus square root of 103 i and denominator 8
D
the fraction with numerator 5 plus or minus square root of 153 i and denominator 8
25

Which equation has a graph that is a parabola with a vertex at open paren 5 comma 3 close paren ?

A
y is equal to open paren x minus 5 close paren squared plus 3
B
y is equal to open paren x minus 3 close paren squared plus 5
C
y is equal to open paren x plus 5 close paren squared plus 3
D
y is equal to open paren x plus 3 close paren squared plus 5

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