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Grade 9 Quadratic Formula & Vertex Worksheet with Answers
Grade 9 (US) · Year 10 (UK) · Class 9 (India) · Math
Unit 8: Going FurtherAdvanced: Algebra II PreviewCCSS A-REI.B.4bAdvanced
Solving quadratics with the quadratic formula and finding the vertex of a parabola. This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.
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Practice Sheetaethelsystems.comQuadratic Formula & Vertex
Grade 9 · Math
Name
Class
Date
Learning goal: Advanced: Algebra II Preview · CCSS A-REI.B.4b
Directions: Solve each problem. Show your work, then write your answer in the box.
Use the quadratic formula to solve: x² + x - 6 = 0
Answer: x = -3 or x = 2
RememberQuadratics
- 1
Use the quadratic formula to solve: 3x² - 18x + 15 = 0
Answer - 2
Use the quadratic formula to solve: x² - 36 = 0
Answer - 3
Find the vertex of y = x² + 8x + 17
Answer - 4
Find the vertex of y = 2x² + 8x - 1
Answer - 5
Use the quadratic formula to solve: x² - 3x + 2 = 0
Answer - 6
Use the quadratic formula to solve: x² + 4x = 0
Answer - 7
Use the quadratic formula to solve: 3x² - 9x - 84 = 0
Answer - 8
Use the quadratic formula to solve: 2x² - 22x + 60 = 0
Answer - 9
Use the quadratic formula to solve: x² + 3x - 4 = 0
Answer - 10
Find the vertex of y = x² + 2x + 7
Answer - 11
Use the quadratic formula to solve: 2x² - 12x + 16 = 0
Answer - 12
Find the vertex of y = x² - 6x + 2
Answer
★ Challenge corner for fast finishers
If 2^x = 64, what is 4^x?
How did I do?
Teacher's comments
Free printable worksheets with answer keys · aethelsystems.com/worksheets/math/9/quadratic_formula
Answer key — Quadratic Formula & Vertex (Grade 9)
- 1.x = 1 or x = 5
- 2.x = -6 or x = 6
- 3.(-4, 1)
- 4.(-2, -9)
- 5.x = 1 or x = 2
- 6.x = -4 or x = 0
- 7.x = -4 or x = 7
- 8.x = 5 or x = 6
- 9.x = -4 or x = 1
- 10.(-1, 6)
- 11.x = 2 or x = 4
- 12.(3, -7)
- ★4096
Answer key (click to show)
- 1.x = 1 or x = 5
- 2.x = -6 or x = 6
- 3.(-4, 1)
- 4.(-2, -9)
- 5.x = 1 or x = 2
- 6.x = -4 or x = 0
- 7.x = -4 or x = 7
- 8.x = 5 or x = 6
- 9.x = -4 or x = 1
- 10.(-1, 6)
- 11.x = 2 or x = 4
- 12.(3, -7)
- ★4096 (challenge corner)
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