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24 = x^2 - 4x + 3

Rewrite the equation by completing the square.
A) x^2 - 4x + 4 = 27
B) (x - 2)^2 = 27
C) x^2 - 4x + 4 = 24
D) (x - 2)^2 = 24

What are the solutions to the equation?
A) x = 2 ± √24
B) x = 2 ± √27
C) x = 2 ± 4
D) x = 2 ± 3

User JM Lord
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1 Answer

3 votes

Final answer:

To rewrite the equation by completing the square, add the square of half the coefficient of the x-term to both sides. The equation (x - 2)^2 = 27 is the correct rewritten equation. The solutions to the equation are x = 2 ± √27.

Step-by-step explanation:

To rewrite the equation by completing the square, we want to make the quadratic expression on the left side of the equation a perfect square trinomial. We can do this by adding the square of half the coefficient of the x-term to both sides of the equation.

Here's how:

24 = x^2 - 4x + 3

24 + (4/2)^2 = x^2 - 4x + 3 + (4/2)^2

24 + 4 = x^2 - 4x + 4 + 3

28 = (x - 2)^2 + 3

So the rewritten equation is (x - 2)^2 = 25.

The correct answer choice is B) (x - 2)^2 = 27.

To find the solutions to the equation, we can take the square root of both sides:

√[(x - 2)^2] = ±√27

x - 2 = ±√27

x = 2 ± √27

User Pawegio
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