Which step(s) are errors is it step 1 step 2 step 3 step4 or step 5?

Answer:
Step 1, and step 5
Step-by-step explanation:
The end of the equation has to equal 0, so c can not be -6 but instead -12.
They forgot about the 4 +/- the square root of 40 in the last step.
Answer:
Step 1
Step-by-step explanation:
c is not -6. Because the equation equals 6, we will add 6 to both sides to set it equal to zero, which will make c=0