Unit Test — Unit test Answers

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The graph of a quadratic inequality is shown.

Question illustration
A
y greater-than 3 (x + 15)(x + 3)
B
y greater-than-or-equal-to (x + 15)(x + 3)
C
y greater-than 0.25 (x minus 15)(x minus 3)
D
y greater-than-or-equal-to (x minus 15)(x minus 3)
23

Which statement about the following equation is true?2x2 – 9x + 2 = –1

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

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