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Common Core Standard HSN-CN.B.5 Questions

(+) Represent addition, subtraction, multiplication, and conjugation of complex numbers geometrically on the complex plane; use properties of this representation for computation. For example, (-1 + √3 i)3 = 8 because (-1 + √3 i) has modulus 2 and argument 120°.

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Grade 9 Complex Numbers CCSS: HSN-CN.B.5
Select the answer choice that best represents your answer when you simplify the following expression:
[math] -6i(10i + 2) [/math]
  1. [math]4i + 12i[/math]
  2. [math]-16i^2 + 12i[/math]
  3. [math]-12i + 60[/math]
  4. [math]12i - 60[/math]
Grade 12 Complex Numbers CCSS: HSN-CN.B.5
[math](6+5i)-(-2+i)[/math]
  1. [math]4+4i[/math]
  2. [math]8+4i[/math]
  3. [math]10i[/math]
  4. [math]12i[/math]
Grade 10 Radicals CCSS: HSN-CN.B.5
[math]x^2=17[/math]
  1. [math] pm17 [/math]
  2. [math] pm sqrt(17) [/math]
  3. [math] 4.12310562562 [/math]
  4. [math] 17 [/math]
Grade 10 Radicals CCSS: HSN-CN.B.5
[math]3sqrt((-25))[/math]
  1. 15i
  2. 15√(-1)
  3. 3.87298335i
  4. 3.87298334621
Grade 11 Quadratic Equations and Expressions CCSS: HSN-CN.B.5
Write the expression as a complex number in standard form.

(3 - 5i)(1 + 3i)
  1. 3 - 15i
  2. -2i + 4i
  3. 18 + 4i
  4. 15 - 2i

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