7x^2+5x-3=2

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Solution for 7x^2+5x-3=2 equation:


Simplifying
7x2 + 5x + -3 = 2

Reorder the terms:
-3 + 5x + 7x2 = 2

Solving
-3 + 5x + 7x2 = 2

Solving for variable 'x'.

Reorder the terms:
-3 + -2 + 5x + 7x2 = 2 + -2

Combine like terms: -3 + -2 = -5
-5 + 5x + 7x2 = 2 + -2

Combine like terms: 2 + -2 = 0
-5 + 5x + 7x2 = 0

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

Divide each side by '7'.
-0.7142857143 + 0.7142857143x + x2 = 0

Move the constant term to the right:

Add '0.7142857143' to each side of the equation.
-0.7142857143 + 0.7142857143x + 0.7142857143 + x2 = 0 + 0.7142857143

Reorder the terms:
-0.7142857143 + 0.7142857143 + 0.7142857143x + x2 = 0 + 0.7142857143

Combine like terms: -0.7142857143 + 0.7142857143 = 0.0000000000
0.0000000000 + 0.7142857143x + x2 = 0 + 0.7142857143
0.7142857143x + x2 = 0 + 0.7142857143

Combine like terms: 0 + 0.7142857143 = 0.7142857143
0.7142857143x + x2 = 0.7142857143

The x term is 0.7142857143x.  Take half its coefficient (0.3571428572).
Square it (0.1275510204) and add it to both sides.

Add '0.1275510204' to each side of the equation.
0.7142857143x + 0.1275510204 + x2 = 0.7142857143 + 0.1275510204

Reorder the terms:
0.1275510204 + 0.7142857143x + x2 = 0.7142857143 + 0.1275510204

Combine like terms: 0.7142857143 + 0.1275510204 = 0.8418367347
0.1275510204 + 0.7142857143x + x2 = 0.8418367347

Factor a perfect square on the left side:
(x + 0.3571428572)(x + 0.3571428572) = 0.8418367347

Calculate the square root of the right side: 0.917516613

Break this problem into two subproblems by setting 
(x + 0.3571428572) equal to 0.917516613 and -0.917516613.

Subproblem 1

x + 0.3571428572 = 0.917516613 Simplifying x + 0.3571428572 = 0.917516613 Reorder the terms: 0.3571428572 + x = 0.917516613 Solving 0.3571428572 + x = 0.917516613 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3571428572' to each side of the equation. 0.3571428572 + -0.3571428572 + x = 0.917516613 + -0.3571428572 Combine like terms: 0.3571428572 + -0.3571428572 = 0.0000000000 0.0000000000 + x = 0.917516613 + -0.3571428572 x = 0.917516613 + -0.3571428572 Combine like terms: 0.917516613 + -0.3571428572 = 0.5603737558 x = 0.5603737558 Simplifying x = 0.5603737558

Subproblem 2

x + 0.3571428572 = -0.917516613 Simplifying x + 0.3571428572 = -0.917516613 Reorder the terms: 0.3571428572 + x = -0.917516613 Solving 0.3571428572 + x = -0.917516613 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3571428572' to each side of the equation. 0.3571428572 + -0.3571428572 + x = -0.917516613 + -0.3571428572 Combine like terms: 0.3571428572 + -0.3571428572 = 0.0000000000 0.0000000000 + x = -0.917516613 + -0.3571428572 x = -0.917516613 + -0.3571428572 Combine like terms: -0.917516613 + -0.3571428572 = -1.2746594702 x = -1.2746594702 Simplifying x = -1.2746594702

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5603737558, -1.2746594702}

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