5x^2-10x-47=-3

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Solution for 5x^2-10x-47=-3 equation:


Simplifying
5x2 + -10x + -47 = -3

Reorder the terms:
-47 + -10x + 5x2 = -3

Solving
-47 + -10x + 5x2 = -3

Solving for variable 'x'.

Reorder the terms:
-47 + 3 + -10x + 5x2 = -3 + 3

Combine like terms: -47 + 3 = -44
-44 + -10x + 5x2 = -3 + 3

Combine like terms: -3 + 3 = 0
-44 + -10x + 5x2 = 0

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

Divide each side by '5'.
-8.8 + -2x + x2 = 0

Move the constant term to the right:

Add '8.8' to each side of the equation.
-8.8 + -2x + 8.8 + x2 = 0 + 8.8

Reorder the terms:
-8.8 + 8.8 + -2x + x2 = 0 + 8.8

Combine like terms: -8.8 + 8.8 = 0.0
0.0 + -2x + x2 = 0 + 8.8
-2x + x2 = 0 + 8.8

Combine like terms: 0 + 8.8 = 8.8
-2x + x2 = 8.8

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 8.8 + 1

Reorder the terms:
1 + -2x + x2 = 8.8 + 1

Combine like terms: 8.8 + 1 = 9.8
1 + -2x + x2 = 9.8

Factor a perfect square on the left side:
(x + -1)(x + -1) = 9.8

Calculate the square root of the right side: 3.130495169

Break this problem into two subproblems by setting 
(x + -1) equal to 3.130495169 and -3.130495169.

Subproblem 1

x + -1 = 3.130495169 Simplifying x + -1 = 3.130495169 Reorder the terms: -1 + x = 3.130495169 Solving -1 + x = 3.130495169 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 3.130495169 + 1 Combine like terms: -1 + 1 = 0 0 + x = 3.130495169 + 1 x = 3.130495169 + 1 Combine like terms: 3.130495169 + 1 = 4.130495169 x = 4.130495169 Simplifying x = 4.130495169

Subproblem 2

x + -1 = -3.130495169 Simplifying x + -1 = -3.130495169 Reorder the terms: -1 + x = -3.130495169 Solving -1 + x = -3.130495169 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -3.130495169 + 1 Combine like terms: -1 + 1 = 0 0 + x = -3.130495169 + 1 x = -3.130495169 + 1 Combine like terms: -3.130495169 + 1 = -2.130495169 x = -2.130495169 Simplifying x = -2.130495169

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.130495169, -2.130495169}

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