<span>x^2 + 8x = -3
</span><span>x^2 + 8x + 16 = -3 + 16
using a^2 + 2 a b + b^2 = (a+b)^2
</span><span>
</span>x^2 + 8x + 16 = 13
<span>(x +4)^2 = 13
answer : 16 is the number </span><span>you must add to complete the square</span>
Answer: 30
Step-by-step explanation:
Answer:
![x = 4](https://tex.z-dn.net/?f=x%20%3D%204)
![ac = 56](https://tex.z-dn.net/?f=ac%20%3D%2056)
Step-by-step explanation:
![6x + 3 = 7x - 1](https://tex.z-dn.net/?f=6x%20%2B%203%20%3D%207x%20-%201)
![7x - 6x = 3+ 1](https://tex.z-dn.net/?f=7x%20-%206x%20%3D%203%2B%201)
![6x + 3 + 7x + 1 = 56](https://tex.z-dn.net/?f=6x%20%2B%203%20%20%2B%207x%20%2B%201%20%3D%2056)
![x = 4](https://tex.z-dn.net/?f=x%20%3D%204)