5*x*(5*x+7)=2*x-3

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Solution for 5*x*(5*x+7)=2*x-3 equation:


Simplifying
5x(5x + 7) = 2x + -3

Reorder the terms:
5x(7 + 5x) = 2x + -3
(7 * 5x + 5x * 5x) = 2x + -3
(35x + 25x2) = 2x + -3

Reorder the terms:
35x + 25x2 = -3 + 2x

Solving
35x + 25x2 = -3 + 2x

Solving for variable 'x'.

Reorder the terms:
3 + 35x + -2x + 25x2 = -3 + 2x + 3 + -2x

Combine like terms: 35x + -2x = 33x
3 + 33x + 25x2 = -3 + 2x + 3 + -2x

Reorder the terms:
3 + 33x + 25x2 = -3 + 3 + 2x + -2x

Combine like terms: -3 + 3 = 0
3 + 33x + 25x2 = 0 + 2x + -2x
3 + 33x + 25x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
3 + 33x + 25x2 = 0

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

Divide each side by '25'.
0.12 + 1.32x + x2 = 0

Move the constant term to the right:

Add '-0.12' to each side of the equation.
0.12 + 1.32x + -0.12 + x2 = 0 + -0.12

Reorder the terms:
0.12 + -0.12 + 1.32x + x2 = 0 + -0.12

Combine like terms: 0.12 + -0.12 = 0.00
0.00 + 1.32x + x2 = 0 + -0.12
1.32x + x2 = 0 + -0.12

Combine like terms: 0 + -0.12 = -0.12
1.32x + x2 = -0.12

The x term is 1.32x.  Take half its coefficient (0.66).
Square it (0.4356) and add it to both sides.

Add '0.4356' to each side of the equation.
1.32x + 0.4356 + x2 = -0.12 + 0.4356

Reorder the terms:
0.4356 + 1.32x + x2 = -0.12 + 0.4356

Combine like terms: -0.12 + 0.4356 = 0.3156
0.4356 + 1.32x + x2 = 0.3156

Factor a perfect square on the left side:
(x + 0.66)(x + 0.66) = 0.3156

Calculate the square root of the right side: 0.561782876

Break this problem into two subproblems by setting 
(x + 0.66) equal to 0.561782876 and -0.561782876.

Subproblem 1

x + 0.66 = 0.561782876 Simplifying x + 0.66 = 0.561782876 Reorder the terms: 0.66 + x = 0.561782876 Solving 0.66 + x = 0.561782876 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.66' to each side of the equation. 0.66 + -0.66 + x = 0.561782876 + -0.66 Combine like terms: 0.66 + -0.66 = 0.00 0.00 + x = 0.561782876 + -0.66 x = 0.561782876 + -0.66 Combine like terms: 0.561782876 + -0.66 = -0.098217124 x = -0.098217124 Simplifying x = -0.098217124

Subproblem 2

x + 0.66 = -0.561782876 Simplifying x + 0.66 = -0.561782876 Reorder the terms: 0.66 + x = -0.561782876 Solving 0.66 + x = -0.561782876 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.66' to each side of the equation. 0.66 + -0.66 + x = -0.561782876 + -0.66 Combine like terms: 0.66 + -0.66 = 0.00 0.00 + x = -0.561782876 + -0.66 x = -0.561782876 + -0.66 Combine like terms: -0.561782876 + -0.66 = -1.221782876 x = -1.221782876 Simplifying x = -1.221782876

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.098217124, -1.221782876}

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