6 Cumulative Test Prep

Vocabulary Review

As you solve test items, you must understand the meanings of mathematical terms. Match each term with its mathematical meaning.

Multiple Choice

Read each question. Then write the letter of the correct answer on your paper.

1. Find all the roots of 2 x 4 + x 3 − 8 x 2 − 4 x = 0 . 2 x to the fourth , plus , x cubed , minus , 8 x squared , minus 4 x equals 0 .
   1. x = − 2 , x = − 0.5 , x = 0 , x = 2 x equals negative 2 comma x equals negative 0.5 comma x equals 0 comma x equals 2
   2. x = − 2 , x = − 0.5 , x = 2 x equals negative 2 comma x equals negative 0.5 comma x equals 2
   3. x = − 2 , x = 0.5 , x = 0 , x = 2 x equals negative 2 comma x equals 0.5 comma x equals 0 comma x equals 2
   4. x = − 2 , x = 0.5 , x = 2 x equals negative 2 comma x equals 0.5 comma x equals 2
2. Solve the equation a x 2 + b x + c = 0 eh x squared , plus b x plus c equals 0  for b.
   6. b = − c x − a x 2 b equals negative c x minus , eh x squared
   7. b = − c − a x 2 x b equals . fraction negative c minus eh , x squared , over x end fraction
   8. b = − ( c x − a x 2 ) b equals negative open c x minus , eh x squared , close
   9. b = − ( c − a x 2 ) x b equals . fraction negative . open . c minus eh , x squared . close , over x end fraction
3. Use the sum of cubes formula to factor x 3 + 64 . x cubed , plus 64 .
   1. ( x + 4 ) ( x 2 − 4 x + 4 ) open x plus 4 close open , x squared , minus 4 x plus 4 close
   2. ( x + 4 ) ( x 2 + 4 x + 4 ) open x plus 4 close open , x squared , plus 4 x plus 4 close
   3. ( x + 4 ) ( x 2 − 4 x + 16 ) open x plus 4 close open , x squared , minus 4 x plus 16 close
   4. ( x + 4 ) ( x 2 + 4 x + 16 ) open x plus 4 close open , x squared , plus 4 x plus 16 close

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