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Josephine solved a quadratic equation: (x+6)^2=49. Her work is shown below.

Step 1: √(x+6)^2 = √49
Step 2: x+6 = 7
Step 3: x = 7−6
Step 4: x = 1
In which step did Josephine make an error?
A- step 4
B- step 1
C- step 2
D- step 3

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2 answers

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  2. Step 1: √(x+6)^2 = √49
    no
    Step 1: √(x+6)^2 = +or-√49
    so
    x + 6 = 7
    or
    x + 6 = -7
    x = 1
    or x = - 13

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