-1=5x^2+2x-3

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Solution for -1=5x^2+2x-3 equation:


Simplifying
-1 = 5x2 + 2x + -3

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

Solving
-1 = -3 + 2x + 5x2

Solving for variable 'x'.

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

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

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

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

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

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

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

Move the constant term to the right:

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

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

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

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

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 = 0.4 + 0.04

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

Combine like terms: 0.4 + 0.04 = 0.44
0.04 + 0.4x + x2 = 0.44

Factor a perfect square on the left side:
(x + 0.2)(x + 0.2) = 0.44

Calculate the square root of the right side: 0.663324958

Break this problem into two subproblems by setting 
(x + 0.2) equal to 0.663324958 and -0.663324958.

Subproblem 1

x + 0.2 = 0.663324958 Simplifying x + 0.2 = 0.663324958 Reorder the terms: 0.2 + x = 0.663324958 Solving 0.2 + x = 0.663324958 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + x = 0.663324958 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + x = 0.663324958 + -0.2 x = 0.663324958 + -0.2 Combine like terms: 0.663324958 + -0.2 = 0.463324958 x = 0.463324958 Simplifying x = 0.463324958

Subproblem 2

x + 0.2 = -0.663324958 Simplifying x + 0.2 = -0.663324958 Reorder the terms: 0.2 + x = -0.663324958 Solving 0.2 + x = -0.663324958 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + x = -0.663324958 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + x = -0.663324958 + -0.2 x = -0.663324958 + -0.2 Combine like terms: -0.663324958 + -0.2 = -0.863324958 x = -0.863324958 Simplifying x = -0.863324958

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.463324958, -0.863324958}

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