Unit Test — Unit test Answers
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21
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What are the roots of the polynomial equation ? Use a graphing calculator and a system of equations.
A
–6, 6B
–4, 1, 3C
–3, –1, 4D
1, 322
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Which statement describes the graph of this polynomial function?
A
The graph crosses the x-axis at x = 0 and touches the x-axis at x = 3.B
The graph touches the x-axis at x = 0 and crosses the x-axis at x = 3.C
The graph crosses the x-axis at x = 0 and touches the x-axis at x = –3.D
The graph touches the x-axis at x = 0 and crosses the x-axis at x = –3.23
Which of the following is the complete list of roots for the polynomial function ?
A
–3 + 2i, –3 – 2iB
–2, –4C
–2, –4, –3 + 2i, –3 – 2iD
–2, –4, –3 + 2i, 3 + 2i24
A polynomial function has a root of –6 with multiplicity 1, a root of –2 with multiplicity 3, a root of 0 with multiplicity 2, and a root of 4 with multiplicity 3. If the function has a positive leading coefficient and is of odd degree, which statement about the graph is true?
A
The graph of the function is positive on (–6, –2).B
The graph of the function is negative on (, 0).
C
The graph of the function is positive on (–2, 4).D
The graph of the function is negative on (4, ).
25
What are the solutions of the equation (2x + 3)2 + 8(2x + 3) + 11 = 0? Use u substitution and the quadratic formula to solve.
A
x = StartFraction negative 4 plus-or-minus StartRoot 5 EndRoot Over 2 EndFraction
B
x = StartFraction negative 7 plus-or-minus StartRoot 5 EndRoot Over 2 EndFraction
C
x = –7 and x = –2D
x = –1 and x = 4Did you find these answers helpful?
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