Solve 85f=-4f 18f

Evaluate

85 f = - 4 f \times 18 f

Multiply

More Steps

85 f = - 72 f^{2}

Swap the sides

- 72 f^{2} = 85 f

Move the expression to the left side

- 72 f^{2} - 85 f = 0

Factor the expression

More Steps

- f (72 f + 85) = 0

When the product of factors equals 0,at least one factor is 0

- f = 0 72 f + 85 = 0

Solve the equation for f

f = 0 72 f + 85 = 0

Solve the equation for f

More Steps

f = 0 f = - \frac{85}{72}

Solution

f_{1} = - \frac{85}{72}, f_{2} = 0

Alternative Form

f_{1} = - 1.180 \dot{5}, f_{2} = 0

Solve the quadratic equation