0.4x^2+2=x

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Solution for 0.4x^2+2=x equation:


Simplifying
0.4x2 + 2 = x

Reorder the terms:
2 + 0.4x2 = x

Solving
2 + 0.4x2 = x

Solving for variable 'x'.

Reorder the terms:
2 + -1x + 0.4x2 = x + -1x

Combine like terms: x + -1x = 0
2 + -1x + 0.4x2 = 0

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

Divide each side by '0.4'.
5 + -2.5x + x2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -2.5x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + -2.5x + x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -2.5x + x2 = 0 + -5
-2.5x + x2 = 0 + -5

Combine like terms: 0 + -5 = -5
-2.5x + x2 = -5

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = -5 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = -5 + 1.5625

Combine like terms: -5 + 1.5625 = -3.4375
1.5625 + -2.5x + x2 = -3.4375

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = -3.4375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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