Jess solved the quadratic equation x ^ 2 + 2x = 8 but made a mistake. Her work is shown below. Identify the step(s) in which a mistake was made. step 1:x^ 2 +2x-8=0; step 2:(x-4)(x+2)=0; step 3:x-4=0 or x + 2 = 0 Step 4 / x = - 4 or x = - 2 A Step 2 only B Step 3 only Step 4 only D Steps 2 and 3 E Steps 2 and 4
The mistake was made in Step 4.
The correct solutions should be:
x - 4 = 0 => x = 4
x + 2 = 0 => x = -2
So the correct answer is D) Step 4 only.