The weight in pounds of seven packages are 25, 10, 20, 4, 6, 3, and 9. The weight of an eighth package is added to the list. The
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Answer:
Her error is that For solving by Completing the square method.
She has not made the Coefficient of x² as 1.
Therefore,
Step-by-step explanation:
Alex was solving the equation
She is solving for x by Completing the square method
Her error is that For solving by Completing the square method
First step is to make Coefficient of x² as 1 ( one )
She has not made the Coefficient of x² as 1
The Require steps for the equation by Completing the square method are
Step 1 : Given
Step 2: Divide the whole by 2 we get
Step 3 : Add 10 to both side
Step 4 : Add to both the side.
Step 5 : We have A² + 2AB + B² = (A+B)²
Step 6 : Taking Square root
Step 7 : Subtract both side
Step 8 : Finally we get
Therefore,