7=-4x-10x^2

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Solution for 7=-4x-10x^2 equation:


Simplifying
7 = -4x + -10x2

Solving
7 = -4x + -10x2

Solving for variable 'x'.

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

Combine like terms: -4x + 4x = 0
7 + 4x + 10x2 = 0 + -10x2 + 10x2
7 + 4x + 10x2 = -10x2 + 10x2

Combine like terms: -10x2 + 10x2 = 0
7 + 4x + 10x2 = 0

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

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

Move the constant term to the right:

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

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

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

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

The x term is 0.4x.  Take half its coefficient (0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
0.4x + 0.04 + x2 = -0.7 + 0.04

Reorder the terms:
0.04 + 0.4x + x2 = -0.7 + 0.04

Combine like terms: -0.7 + 0.04 = -0.66
0.04 + 0.4x + x2 = -0.66

Factor a perfect square on the left side:
(x + 0.2)(x + 0.2) = -0.66

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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