1.4x(5x-4)=-1.4

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Solution for 1.4x(5x-4)=-1.4 equation:


Simplifying
1.4x(5x + -4) = -1.4

Reorder the terms:
1.4x(-4 + 5x) = -1.4
(-4 * 1.4x + 5x * 1.4x) = -1.4
(-5.6x + 7x2) = -1.4

Solving
-5.6x + 7x2 = -1.4

Solving for variable 'x'.

Reorder the terms:
1.4 + -5.6x + 7x2 = -1.4 + 1.4

Combine like terms: -1.4 + 1.4 = 0.0
1.4 + -5.6x + 7x2 = 0.0

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

Divide each side by '7'.
0.2 + -0.8x + x2 = 0.0

Move the constant term to the right:

Add '-0.2' to each side of the equation.
0.2 + -0.8x + -0.2 + x2 = 0.0 + -0.2

Reorder the terms:
0.2 + -0.2 + -0.8x + x2 = 0.0 + -0.2

Combine like terms: 0.2 + -0.2 = 0.0
0.0 + -0.8x + x2 = 0.0 + -0.2
-0.8x + x2 = 0.0 + -0.2

Combine like terms: 0.0 + -0.2 = -0.2
-0.8x + x2 = -0.2

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 = -0.2 + 0.16

Reorder the terms:
0.16 + -0.8x + x2 = -0.2 + 0.16

Combine like terms: -0.2 + 0.16 = -0.04
0.16 + -0.8x + x2 = -0.04

Factor a perfect square on the left side:
(x + -0.4)(x + -0.4) = -0.04

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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