4f^2-9f+15=0

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Solution for 4f^2-9f+15=0 equation:


Simplifying
4f2 + -9f + 15 = 0

Reorder the terms:
15 + -9f + 4f2 = 0

Solving
15 + -9f + 4f2 = 0

Solving for variable 'f'.

Begin completing the square.  Divide all terms by
4 the coefficient of the squared term: 

Divide each side by '4'.
3.75 + -2.25f + f2 = 0

Move the constant term to the right:

Add '-3.75' to each side of the equation.
3.75 + -2.25f + -3.75 + f2 = 0 + -3.75

Reorder the terms:
3.75 + -3.75 + -2.25f + f2 = 0 + -3.75

Combine like terms: 3.75 + -3.75 = 0.00
0.00 + -2.25f + f2 = 0 + -3.75
-2.25f + f2 = 0 + -3.75

Combine like terms: 0 + -3.75 = -3.75
-2.25f + f2 = -3.75

The f term is -2.25f.  Take half its coefficient (-1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
-2.25f + 1.265625 + f2 = -3.75 + 1.265625

Reorder the terms:
1.265625 + -2.25f + f2 = -3.75 + 1.265625

Combine like terms: -3.75 + 1.265625 = -2.484375
1.265625 + -2.25f + f2 = -2.484375

Factor a perfect square on the left side:
(f + -1.125)(f + -1.125) = -2.484375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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