Respuesta :

Answer:

Step-by-step explanation:

Solving for x. Want to solve for f instead?

Step 1 move all terms to one side

fx - 4x² + 100 =0

Step 2 Use the Quadratic Formula

x = -f + √f² + 1600 ÷ -8,   -f-√f²+1600 ÷ -8

Done.