x(x-2)+x(x+1)=x-2(x)+x-2(x+5)

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Solution for x(x-2)+x(x+1)=x-2(x)+x-2(x+5) equation:


Simplifying
x(x + -2) + x(x + 1) = x + -2(x) + x + -2(x + 5)

Reorder the terms:
x(-2 + x) + x(x + 1) = x + -2(x) + x + -2(x + 5)
(-2 * x + x * x) + x(x + 1) = x + -2(x) + x + -2(x + 5)
(-2x + x2) + x(x + 1) = x + -2(x) + x + -2(x + 5)

Reorder the terms:
-2x + x2 + x(1 + x) = x + -2(x) + x + -2(x + 5)
-2x + x2 + (1 * x + x * x) = x + -2(x) + x + -2(x + 5)
-2x + x2 + (1x + x2) = x + -2(x) + x + -2(x + 5)

Reorder the terms:
-2x + 1x + x2 + x2 = x + -2(x) + x + -2(x + 5)

Combine like terms: -2x + 1x = -1x
-1x + x2 + x2 = x + -2(x) + x + -2(x + 5)

Combine like terms: x2 + x2 = 2x2
-1x + 2x2 = x + -2(x) + x + -2(x + 5)

Reorder the terms:
-1x + 2x2 = x + -2x + x + -2(5 + x)
-1x + 2x2 = x + -2x + x + (5 * -2 + x * -2)
-1x + 2x2 = x + -2x + x + (-10 + -2x)

Reorder the terms:
-1x + 2x2 = -10 + x + -2x + x + -2x

Combine like terms: x + -2x = -1x
-1x + 2x2 = -10 + -1x + x + -2x

Combine like terms: -1x + x = 0
-1x + 2x2 = -10 + 0 + -2x
-1x + 2x2 = -10 + -2x

Solving
-1x + 2x2 = -10 + -2x

Solving for variable 'x'.

Reorder the terms:
10 + -1x + 2x + 2x2 = -10 + -2x + 10 + 2x

Combine like terms: -1x + 2x = 1x
10 + 1x + 2x2 = -10 + -2x + 10 + 2x

Reorder the terms:
10 + 1x + 2x2 = -10 + 10 + -2x + 2x

Combine like terms: -10 + 10 = 0
10 + 1x + 2x2 = 0 + -2x + 2x
10 + 1x + 2x2 = -2x + 2x

Combine like terms: -2x + 2x = 0
10 + 1x + 2x2 = 0

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

Divide each side by '2'.
5 + 0.5x + x2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + 0.5x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + 0.5x + x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 0.5x + x2 = 0 + -5
0.5x + x2 = 0 + -5

Combine like terms: 0 + -5 = -5
0.5x + x2 = -5

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = -5 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = -5 + 0.0625

Combine like terms: -5 + 0.0625 = -4.9375
0.0625 + 0.5x + x2 = -4.9375

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = -4.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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