Math Problem Statement

Factor and solve the quadratic equation 2x^2 - 5x - 3 = 0 and solve x^2 - 12x + 36 = 64 using the Square Root Property or Completing the Square.

Solution

The problem asks for solving quadratic equations in two parts:

Problem 4:

You are tasked with factoring and solving the quadratic equation:

2x25x3=02x^2 - 5x - 3 = 0

Steps to solve:

  1. Multiply 22 (the coefficient of x2x^2) and 3-3 (the constant term), which equals 6-6.
  2. Find two numbers that multiply to 6-6 and add to 5-5 (the middle term coefficient). The numbers are 6-6 and 11.
  3. Rewrite the middle term: 2x26x+x3=02x^2 - 6x + x - 3 = 0.
  4. Group terms: (2x26x)+(x3)=0(2x^2 - 6x) + (x - 3) = 0.
  5. Factor out common terms: 2x(x3)+1(x3)=02x(x - 3) + 1(x - 3) = 0.
  6. Factor the equation: (2x+1)(x3)=0(2x + 1)(x - 3) = 0.
  7. Solve for xx: x=12x = -\frac{1}{2} or x=3x = 3.

The factored equation is (2x+1)(x3)=0(2x + 1)(x - 3) = 0 and the solutions are x=12x = -\frac{1}{2} and x=3x = 3.


Problem 5:

You are asked to solve the equation using the Square Root Property or Completing the Square. The given equation is:

x212x+36=64x^2 - 12x + 36 = 64

Steps to solve:

  1. Rewrite the equation: (x6)2=64(x - 6)^2 = 64 (since x212x+36x^2 - 12x + 36 is a perfect square trinomial).
  2. Take the square root of both sides: x6=±8x - 6 = \pm 8.
  3. Solve for xx:
    • x6=8x=14x - 6 = 8 \Rightarrow x = 14,
    • x6=8x=2x - 6 = -8 \Rightarrow x = -2.

The solutions are x=14x = 14 and x=2x = -2.


Do you need detailed explanations for these steps or further clarification? Here are related questions to deepen your understanding:

  1. Why is factoring a useful method for solving quadratic equations?
  2. How do you determine when to use the Square Root Property versus Completing the Square?
  3. What does it mean geometrically when solving (x6)2=64(x - 6)^2 = 64?
  4. Can every quadratic equation be solved by factoring? Why or why not?
  5. What are some common mistakes to avoid when factoring or completing the square?

Tip: Always check your solutions by substituting them back into the original equation to ensure they satisfy it.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Equations
Factoring
Completing the Square
Square Root Property

Formulas

Quadratic equation formula: ax^2 + bx + c = 0
Factoring technique for ax^2 + bx + c
Square Root Property: x^2 = k implies x = ±√k

Theorems

Zero Product Property

Suitable Grade Level

Grades 9-10