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Ch 24: ACT Math: Complex Numbers

About This Chapter

Look again at key algebra concepts for the math portion of your ACT with assistance from our lessons and quizzes. The short, video lessons are informative and user-friendly.

ACT Math: Complex Numbers - Chapter Summary

Review the essential information about complex numbers for the algebra portion of the math test in the ACT. The topics below are included in the lessons:

  • Imaginary numbers
  • Adding, subtracting, multiplying and dividing complex numbers
  • Solving quadratics with complex numbers as solutions

Our short, video lessons break down the steps of working with complex numbers into manageable pieces. As you work your way through the lessons, make sure that you complete the quick quizzes for self-assessment. Then you'll know of any areas needing more attention.

ACT Math Objectives

You should understand the quadratic formula as a basis for the intermediate algebra portion of the ACT. Of the total 60 math questions on the exam, 15% of them test your understanding of these intermediate algebra topics:

  • Quadratic formula
  • Complex numbers
  • Rational/radical expressions
  • Absolute value equations/inequalities
  • Sequences/patterns
  • Systems of equations
  • Functions
  • Modeling
  • Matrices
  • Roots of polynomials
  • Quadratic inequalities

You'll have 60 minutes to choose the correct answers for the 60 multiple-choice questions on the math exam. Our lessons and quizzes targeting these crucial topics will help you get ready for test day. You may choose to use an approved model of calculator, or complete your work with paper and pencil. Your ACT results will include a score for the entire test and sub-scores for combinations of algebra, geometry and trigonometry sections.

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