The force of attraction between two magnets is inversely proportional to the square of the distance between them. when the magnets are r cm apart, the force of the attraction between is f newtons (n). if the distance between the magnets is increased by 400%, the force of magnets between them becomes cf n . find the value of c.

The force of attraction between 2 magnets is inversely proportional to it's distance squared.

That means

so when the magnets are 4 times apart the resultant force is divided 8 times.

So,

We can see here C=1/8.

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3