Unit Test — Unit test Answers
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If x2 + mx + m is a perfect-square trinomial, which equation must be true?
A
x2 + mx + m = (x – 1)2B
x2 + mx + m = (x + 1)2C
x2 + mx + m = (x + 2)2D
x2 + mx + m = (x + 4)222
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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.23
Which equation is y = 9x2 + 9x – 1 rewritten in vertex form?
A
y = 9 (x + one-half) squared minus thirteen-fourths
B
y = 9 (x + one-half) squared minus 1
C
y = 9 (x + one-half) squared + five-fourths
D
y = 9 (x + one-half) squared minus five-fourths
24
Which statement about the following equation is true?3x2 – 8x + 5 = 5x2
A
The discriminant is less than 0, so there are two real roots.B
The discriminant is greater than 0, so there are two real roots.C
The discriminant is less than 0, so there are two complex roots.D
The discriminant is greater than 0, so there are two complex roots.25
The area of a triangle is 1,440 cm2. The base of the triangle is 5 times the height. What is the height of the triangle?
A
12 cmB
24 cmC
46 cmD
60 cmDid you find these answers helpful?
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