Math Problem Statement

x + y = 2 y = x2 - 4x + 4

Solution

You have a system of two equations:

  1. x+y=2x + y = 2
  2. y=x24x+4y = x^2 - 4x + 4

To solve this system, we can substitute the expression for yy from the second equation into the first equation.

Step 1: Substitute y=x24x+4y = x^2 - 4x + 4 into x+y=2x + y = 2

x+(x24x+4)=2x + (x^2 - 4x + 4) = 2

Step 2: Simplify the equation

x+x24x+4=2x + x^2 - 4x + 4 = 2

x23x+4=2x^2 - 3x + 4 = 2

Step 3: Move all terms to one side

x23x+42=0x^2 - 3x + 4 - 2 = 0

x23x+2=0x^2 - 3x + 2 = 0

Step 4: Factor the quadratic equation

(x1)(x2)=0(x - 1)(x - 2) = 0

Step 5: Solve for xx

Set each factor equal to zero:

x1=0orx2=0x - 1 = 0 \quad \text{or} \quad x - 2 = 0

x=1orx=2x = 1 \quad \text{or} \quad x = 2

Step 6: Solve for yy

Now, substitute each value of xx back into the second equation y=x24x+4y = x^2 - 4x + 4.

  • When x=1x = 1:

y=124(1)+4=14+4=1y = 1^2 - 4(1) + 4 = 1 - 4 + 4 = 1

  • When x=2x = 2:

y=224(2)+4=48+4=0y = 2^2 - 4(2) + 4 = 4 - 8 + 4 = 0

Final Solution:

The solutions are:

  1. x=1x = 1, y=1y = 1
  2. x=2x = 2, y=0y = 0

Let me know if you'd like a more detailed explanation or have any further questions!


Further Exploration:

  1. What are the graphical representations of these equations?
  2. How does changing the constants in the equations affect the solution?
  3. Can you solve a system where one equation is linear and the other is quadratic in a different way?
  4. What happens to the solution when we add another constraint to the system?
  5. Can this system be solved using matrices?

Tip:

When solving systems of equations, substitution and elimination are powerful methods, especially when one equation is already solved for a variable.

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Math Problem Analysis

Mathematical Concepts

Algebra
Systems of Equations
Quadratic Equations

Formulas

Substitution method for solving systems of equations
Quadratic formula

Theorems

Zero-product property

Suitable Grade Level

Grades 9-11