10x^2+7x+4=0

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Solution for 10x^2+7x+4=0 equation:


Simplifying
10x2 + 7x + 4 = 0

Reorder the terms:
4 + 7x + 10x2 = 0

Solving
4 + 7x + 10x2 = 0

Solving for variable 'x'.

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

Divide each side by '10'.
0.4 + 0.7x + x2 = 0

Move the constant term to the right:

Add '-0.4' to each side of the equation.
0.4 + 0.7x + -0.4 + x2 = 0 + -0.4

Reorder the terms:
0.4 + -0.4 + 0.7x + x2 = 0 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + 0.7x + x2 = 0 + -0.4
0.7x + x2 = 0 + -0.4

Combine like terms: 0 + -0.4 = -0.4
0.7x + x2 = -0.4

The x term is 0.7x.  Take half its coefficient (0.35).
Square it (0.1225) and add it to both sides.

Add '0.1225' to each side of the equation.
0.7x + 0.1225 + x2 = -0.4 + 0.1225

Reorder the terms:
0.1225 + 0.7x + x2 = -0.4 + 0.1225

Combine like terms: -0.4 + 0.1225 = -0.2775
0.1225 + 0.7x + x2 = -0.2775

Factor a perfect square on the left side:
(x + 0.35)(x + 0.35) = -0.2775

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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