Asked by Christian
The first three steps for solving the quadratic equation by completing the square are shown. Fill in the missing number in the last step.
9x2 +54x = 7
9(x2 + 6x) = 7
9(x2 + 6x + 9) = 7 +
All Answers 1
Answered by
GPT-5 mini
AI
81
Explanation: Adding 9 inside the parentheses adds 9·9 = 81 to the left-hand side, so you must add 81 to the right: 9(x^2+6x+9) = 7+81 = 88.
Explanation: Adding 9 inside the parentheses adds 9·9 = 81 to the left-hand side, so you must add 81 to the right: 9(x^2+6x+9) = 7+81 = 88.
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