5x^2-4x=-5

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Solution for 5x^2-4x=-5 equation:


Simplifying
5x2 + -4x = -5

Reorder the terms:
-4x + 5x2 = -5

Solving
-4x + 5x2 = -5

Solving for variable 'x'.

Reorder the terms:
5 + -4x + 5x2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + -4x + 5x2 = 0

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

Divide each side by '5'.
1 + -0.8x + x2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -0.8x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + -0.8x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -0.8x + x2 = 0 + -1
-0.8x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
-0.8x + x2 = -1

The x term is -0.8x.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8x + 0.16 + x2 = -1 + 0.16

Reorder the terms:
0.16 + -0.8x + x2 = -1 + 0.16

Combine like terms: -1 + 0.16 = -0.84
0.16 + -0.8x + x2 = -0.84

Factor a perfect square on the left side:
(x + -0.4)(x + -0.4) = -0.84

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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