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

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