Question

solve by completing the square.
\\y = x^2 + 4x - 7\\
what is the first step?
set the y-value equal to 0.
set the y-value equal to \\(1^2\\).

Explanation:

Set equation to zero

Using the Solving Quadratic Equations knowledge point

$$ 0 = x^2 + 4x - 7 $$

Identify completing the square step

To solve the quadratic equation \(x^2 + 4x - 7 = 0\) by completing the square, we first set the function value \(y\) to \(0\) to find its roots. This establishes the equation to be solved.

Answer:

• Set the y-value equal to 0. (Correct answer)
• Set the y-value equal to \(1^2\).