You must add 6 to complete the square.
x^2+12x+(6)=-5(6)
3x4=5x-10
12=5x-10
22=5x
x=4.4
Answer: y=7
x=5
Step-by-step explanation:

you find what number goes into both number and pull that number outside and then write. 3 (_x+_). you are reversing the distributive property. Hope this helped
Here, just add the coefficients. 3x + 3x = 6x.