(-4x^2+x+5)-(x^2+2x+3)=

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Solution for (-4x^2+x+5)-(x^2+2x+3)= equation:


Simplifying
(-4x2 + x + 5) + -1(x2 + 2x + 3) = 0

Reorder the terms:
(5 + x + -4x2) + -1(x2 + 2x + 3) = 0

Remove parenthesis around (5 + x + -4x2)
5 + x + -4x2 + -1(x2 + 2x + 3) = 0

Reorder the terms:
5 + x + -4x2 + -1(3 + 2x + x2) = 0
5 + x + -4x2 + (3 * -1 + 2x * -1 + x2 * -1) = 0
5 + x + -4x2 + (-3 + -2x + -1x2) = 0

Reorder the terms:
5 + -3 + x + -2x + -4x2 + -1x2 = 0

Combine like terms: 5 + -3 = 2
2 + x + -2x + -4x2 + -1x2 = 0

Combine like terms: x + -2x = -1x
2 + -1x + -4x2 + -1x2 = 0

Combine like terms: -4x2 + -1x2 = -5x2
2 + -1x + -5x2 = 0

Solving
2 + -1x + -5x2 = 0

Solving for variable 'x'.

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

Divide each side by '-5'.
-0.4 + 0.2x + x2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + 0.2x + 0.4 + x2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + 0.2x + x2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + 0.2x + x2 = 0 + 0.4
0.2x + x2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
0.2x + x2 = 0.4

The x term is 0.2x.  Take half its coefficient (0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
0.2x + 0.01 + x2 = 0.4 + 0.01

Reorder the terms:
0.01 + 0.2x + x2 = 0.4 + 0.01

Combine like terms: 0.4 + 0.01 = 0.41
0.01 + 0.2x + x2 = 0.41

Factor a perfect square on the left side:
(x + 0.1)(x + 0.1) = 0.41

Calculate the square root of the right side: 0.640312424

Break this problem into two subproblems by setting 
(x + 0.1) equal to 0.640312424 and -0.640312424.

Subproblem 1

x + 0.1 = 0.640312424 Simplifying x + 0.1 = 0.640312424 Reorder the terms: 0.1 + x = 0.640312424 Solving 0.1 + x = 0.640312424 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + x = 0.640312424 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = 0.640312424 + -0.1 x = 0.640312424 + -0.1 Combine like terms: 0.640312424 + -0.1 = 0.540312424 x = 0.540312424 Simplifying x = 0.540312424

Subproblem 2

x + 0.1 = -0.640312424 Simplifying x + 0.1 = -0.640312424 Reorder the terms: 0.1 + x = -0.640312424 Solving 0.1 + x = -0.640312424 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + x = -0.640312424 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = -0.640312424 + -0.1 x = -0.640312424 + -0.1 Combine like terms: -0.640312424 + -0.1 = -0.740312424 x = -0.740312424 Simplifying x = -0.740312424

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.540312424, -0.740312424}

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