Back to Mathematical Olympiad
Difficulty: 2/102023 NMTC 2023 (QII-37)

If x^2 - 4x + 4 = 0, then the value of x^2 is ________.

Guide / Hint

Hint 1: Recognize that is a perfect square: .

Hint 2: Set and solve for by taking the square root on both sides.

Hint 3: Square the value of to find .

Solution

Step 1 (Factor the Equation): We are given the quadratic equation:

This is a perfect square trinomial:

Step 2 (Substitute x into target): We want to find the value of . Substituting :

Step 3 (Conclusion): The value of is exactly 4.

Ready to track your progress and master these topics?

Create a free account