7x^2+14x=10

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Solution for 7x^2+14x=10 equation:


Simplifying
7x2 + 14x = 10

Reorder the terms:
14x + 7x2 = 10

Solving
14x + 7x2 = 10

Solving for variable 'x'.

Reorder the terms:
-10 + 14x + 7x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + 14x + 7x2 = 0

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

Divide each side by '7'.
-1.428571429 + 2x + x2 = 0

Move the constant term to the right:

Add '1.428571429' to each side of the equation.
-1.428571429 + 2x + 1.428571429 + x2 = 0 + 1.428571429

Reorder the terms:
-1.428571429 + 1.428571429 + 2x + x2 = 0 + 1.428571429

Combine like terms: -1.428571429 + 1.428571429 = 0.000000000
0.000000000 + 2x + x2 = 0 + 1.428571429
2x + x2 = 0 + 1.428571429

Combine like terms: 0 + 1.428571429 = 1.428571429
2x + x2 = 1.428571429

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 = 1.428571429 + 1

Reorder the terms:
1 + 2x + x2 = 1.428571429 + 1

Combine like terms: 1.428571429 + 1 = 2.428571429
1 + 2x + x2 = 2.428571429

Factor a perfect square on the left side:
(x + 1)(x + 1) = 2.428571429

Calculate the square root of the right side: 1.558387445

Break this problem into two subproblems by setting 
(x + 1) equal to 1.558387445 and -1.558387445.

Subproblem 1

x + 1 = 1.558387445 Simplifying x + 1 = 1.558387445 Reorder the terms: 1 + x = 1.558387445 Solving 1 + x = 1.558387445 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 = 1.558387445 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.558387445 + -1 x = 1.558387445 + -1 Combine like terms: 1.558387445 + -1 = 0.558387445 x = 0.558387445 Simplifying x = 0.558387445

Subproblem 2

x + 1 = -1.558387445 Simplifying x + 1 = -1.558387445 Reorder the terms: 1 + x = -1.558387445 Solving 1 + x = -1.558387445 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 = -1.558387445 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.558387445 + -1 x = -1.558387445 + -1 Combine like terms: -1.558387445 + -1 = -2.558387445 x = -2.558387445 Simplifying x = -2.558387445

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.558387445, -2.558387445}

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