Free. Exclusive. Just for you.
Four unique services that make learning easier, faster, and smarter - only on our website.

Math problem-solving tutorial featuring quadratic equations on a black background.

A blackboard with handwritten quadratic equations, including "x² + 12x + 32 = 0" and "-x² - 4x + 9 = 0", under the title "How Do I Solve This?" in yellow text.

A blackboard with handwritten quadratic equations, including "x² + 12x + 32 = 0" and "-x² - 4x + 9 = 0", under the title "How Do I Solve This?" in yellow text.

JPG 1280×720 68.4 KB Free · Personal Use
Quality Assured by Worksheets Library Team
Reviewed for educational accuracy and age-appropriateness
ID: #782719
Show Answer Key & Explanations Step-by-step solution for: How To Solve Quadratic Equations By Completing The Square?
The image contains three quadratic equations. Since no specific one was selected for solving, I will solve all three for completeness.

---

Equation 1: x² + 12x + 32 = 0

Step 1: Look for two numbers that multiply to 32 and add to 12.
Those numbers are 8 and 4.

Step 2: Factor the equation:
(x + 8)(x + 4) = 0

Step 3: Set each factor equal to zero:
x + 8 = 0 → x = -8
x + 4 = 0 → x = -4

Solutions: x = -8, x = -4

---

Equation 2 (boxed): -x² - 4x + 9 = 0

Step 1: Multiply both sides by -1 to make the x² term positive (easier to work with):
x² + 4x - 9 = 0

Step 2: This doesn’t factor nicely, so use the quadratic formula:
x = [-b ± √(b² - 4ac)] / (2a)
Here, a = 1, b = 4, c = -9

Step 3: Plug in values:
Discriminant = b² - 4ac = 16 - 4(1)(-9) = 16 + 36 = 52
√52 = √(4×13) = 2√13

Step 4: Calculate roots:
x = [-4 ± 2√13] / 2 = -2 ± √13

Solutions: x = -2 + √13, x = -2 - √13

---

Equation 3: 3x² - 8x + 5 = 0

Step 1: Try factoring. We need two numbers that multiply to 3×5=15 and add to -8.
Those numbers are -3 and -5.

Step 2: Rewrite middle term:
3x² - 3x - 5x + 5 = 0

Step 3: Group and factor:
(3x² - 3x) - (5x - 5) = 0
3x(x - 1) -5(x - 1) = 0
(3x - 5)(x - 1) = 0

Step 4: Set each factor to zero:
3x - 5 = 0 → x = 5/3
x - 1 = 0 → x = 1

Solutions: x = 1, x = 5/3

---

Final Answer:
x = -8, -4; x = -2 ± √13; x = 1, 5/3
Parent Tip: Review the logic above to help your child master the concept of solving quadratic equations by completing the square worksheet.
Print Download

How to use

Click Print to open a print-ready version directly in your browser, or use Download to save the file to your device. The ⭐ Answer button generates an AI answer key instantly - useful for teachers who need a quick reference. Need a different version? Our AI Worksheet Generator lets you create a custom worksheet on any topic in seconds.

(view all solving quadratic equations by completing the square worksheet)

Solve Quadratic Equations by Competing the Square Worksheets
How To Solve Quadratic Equations By Completing The Square?
Math Example--Quadratics--Solving Quadratics by Completing the ...
Solving Quadratic Equations (D) (by Completing the Square ...
Solving quadratic equations worksheets (with solutions)
Complete the Square 1 Worksheets
Solving Quadratic Equations by Completing the Square Worksheet for ...
Solved SOLVING QUADRATICS WORKSHEET Solve using the Square | Chegg.com
Solving Quadratic Equations by Completing the Square (examples ...
How To Solve Quadratic Equations By Completing The Square