Roots and Equations Worksheet with Quadratic and Cubic Equations 8.EE.A.2

- Grades
- Grade 8
- Pages
- 21
- File type
- Answer key
- Included
- Subject
- Math, Algebra
- Topic
- Square Roots, Cube Roots
- Resource types
- Worksheets
- Answer key
- Included
- Standards
- 8.EE.A.2
Product description
From the author
A printable pdf worksheet for 8th grade math about roots and equations. Students will practice to:
Solve quadratic equations with perfect squares
Solve quadratic equations that have rational answers
Solve quadratic equations that have irrational answers
Remember that there are often two solutions to quadratic equations
Solve cubic equations with perfect cubes
Solve cubic equations that have rational answers
Solve cubic equations that have irrational answers
All answers are included.
In the classroom
Teaching tips & learning objectives
Learning objectives
Solve square equations, giving both real solutions when the right-hand side is positive.
Solve cube equations with positive, negative or fractional values.
Express square and cube roots in exact form.
Teaching tips
Assign the Perfect Squares/Cubes sections before the Square Roots/Cube Roots sections, since the worksheet's own sequence moves from whole-number perfect powers to irrational exact-form answers.
Use the Classify section as a quick formative check after the roots sections, since it tests the rational-versus-irrational distinction those sections build toward.
Check work against the answer section, which includes worked steps and exact answers.
Skills covered
Solving quadratic equations x squared = p -- students find both real solutions for positive right-hand sides (e.g., x = ±7) and recognize that x² = 0 has one real solution.
Solving cubic equations x cubed = p -- students find the single real solution, including for negative values of p, across the cube-equation sections.
Simplifying radicals -- students reduce square and cube roots of large numbers and fractions to exact simplified form.
Good to know
Questions teachers ask about this resource
Why do square equations sometimes have two real solutions?
For a positive value p, both the positive and negative square roots solve x² = p. Zero has one real square root, and negative values have no real square root.
What does the Classify section ask students to do?
Students sort square roots into rational and irrational categories.
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Curriculum
Standards, concepts & topics
Standards
- 8.EE.A.2
Core concepts
Square roots
Cube roots
Rational vs. irrational numbers
Quadratic and cubic equations
Topics
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