Respuesta :

KimNJ

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.

anikakinnear

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