Problem 6 of 7
Complete the square for x^2+4x-7.
Hints
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add and subtract (b/2)^2.
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Leading coefficient must be 1 and the expression must be quadratic in x.
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Correct
Your answer is equivalent to the expected form.
Solution
Walkthrough
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1. Take half of the x-coefficient.
2. Square that value.
3. Add and subtract the square, then factor the perfect-square trinomial.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Forms that add (b/2)^2 without subtracting it to preserve equivalence.