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Meredith solved a quadratic equation. Her work is shown below.
In which step did Meredith make an error?
2(x + 4)2 = 242
(x + 4)2 = 121 Step 1
2+4=11 Step 2
2= 7 Step 3

Respuesta :

quasarJose

Answer:

Step 2

Step-by-step explanation:

Meredith made a fatal mistake or error in step 2;

Any quadratic problem will always have two solutions. Therefore since, we only have one solution here, it is wrong. The mistake was incurred in step 2;

  From the given problem ;

    Wrong                                                  right

    2(x + 4)² = 242

    (x + 4)² = 121     Step 1  

     x+4=11              Step 2                  x + 4  = ± 11

     x  = 7                Step 3                  x + 4  = 11 or x + 4  = -11

                                                           x  = 11- 4     or    x  = -11 - 4

                                                           x  = 7 or -15

Answer:

Step 2

Step-by-step explanation:

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