4x^2-9x+400=0

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Solution for 4x^2-9x+400=0 equation:


Simplifying
4x2 + -9x + 400 = 0

Reorder the terms:
400 + -9x + 4x2 = 0

Solving
400 + -9x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
100 + -2.25x + x2 = 0

Move the constant term to the right:

Add '-100' to each side of the equation.
100 + -2.25x + -100 + x2 = 0 + -100

Reorder the terms:
100 + -100 + -2.25x + x2 = 0 + -100

Combine like terms: 100 + -100 = 0
0 + -2.25x + x2 = 0 + -100
-2.25x + x2 = 0 + -100

Combine like terms: 0 + -100 = -100
-2.25x + x2 = -100

The x term is -2.25x.  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.
-2.25x + 1.265625 + x2 = -100 + 1.265625

Reorder the terms:
1.265625 + -2.25x + x2 = -100 + 1.265625

Combine like terms: -100 + 1.265625 = -98.734375
1.265625 + -2.25x + x2 = -98.734375

Factor a perfect square on the left side:
(x + -1.125)(x + -1.125) = -98.734375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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