Do you have to use the quadratic formula?
If they have the same charge
x+x+x+x+x+x+x=-42
7x=-42
x=-6
so to check our answer
-6-6-6-6-6-6-6=-42
-12-12-12-6=-42
-24-18=-42
-42=-42
I think you forgot to show the right triangle because there is no image I would like to help you if you post the picture
Answer:
4² + b² = 8² or 8² = b² + 4² if following hypotenuse, unknown, and known leg
Step-by-step explanation:
Created by using a² + b² = c²
The answer is the fourth one