7x^2+0.5x=0.07

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Solution for 7x^2+0.5x=0.07 equation:


Simplifying
7x2 + 0.5x = 0.07

Reorder the terms:
0.5x + 7x2 = 0.07

Solving
0.5x + 7x2 = 0.07

Solving for variable 'x'.

Reorder the terms:
-0.07 + 0.5x + 7x2 = 0.07 + -0.07

Combine like terms: 0.07 + -0.07 = 0.00
-0.07 + 0.5x + 7x2 = 0.00

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

Divide each side by '7'.
-0.01 + 0.07142857143x + x2 = 0.00

Move the constant term to the right:

Add '0.01' to each side of the equation.
-0.01 + 0.07142857143x + 0.01 + x2 = 0.00 + 0.01

Reorder the terms:
-0.01 + 0.01 + 0.07142857143x + x2 = 0.00 + 0.01

Combine like terms: -0.01 + 0.01 = 0.00
0.00 + 0.07142857143x + x2 = 0.00 + 0.01
0.07142857143x + x2 = 0.00 + 0.01

Combine like terms: 0.00 + 0.01 = 0.01
0.07142857143x + x2 = 0.01

The x term is 0.07142857143x.  Take half its coefficient (0.03571428572).
Square it (0.001275510204) and add it to both sides.

Add '0.001275510204' to each side of the equation.
0.07142857143x + 0.001275510204 + x2 = 0.01 + 0.001275510204

Reorder the terms:
0.001275510204 + 0.07142857143x + x2 = 0.01 + 0.001275510204

Combine like terms: 0.01 + 0.001275510204 = 0.011275510204
0.001275510204 + 0.07142857143x + x2 = 0.011275510204

Factor a perfect square on the left side:
(x + 0.03571428572)(x + 0.03571428572) = 0.011275510204

Calculate the square root of the right side: 0.106186205

Break this problem into two subproblems by setting 
(x + 0.03571428572) equal to 0.106186205 and -0.106186205.

Subproblem 1

x + 0.03571428572 = 0.106186205 Simplifying x + 0.03571428572 = 0.106186205 Reorder the terms: 0.03571428572 + x = 0.106186205 Solving 0.03571428572 + x = 0.106186205 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.03571428572' to each side of the equation. 0.03571428572 + -0.03571428572 + x = 0.106186205 + -0.03571428572 Combine like terms: 0.03571428572 + -0.03571428572 = 0.00000000000 0.00000000000 + x = 0.106186205 + -0.03571428572 x = 0.106186205 + -0.03571428572 Combine like terms: 0.106186205 + -0.03571428572 = 0.07047191928 x = 0.07047191928 Simplifying x = 0.07047191928

Subproblem 2

x + 0.03571428572 = -0.106186205 Simplifying x + 0.03571428572 = -0.106186205 Reorder the terms: 0.03571428572 + x = -0.106186205 Solving 0.03571428572 + x = -0.106186205 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.03571428572' to each side of the equation. 0.03571428572 + -0.03571428572 + x = -0.106186205 + -0.03571428572 Combine like terms: 0.03571428572 + -0.03571428572 = 0.00000000000 0.00000000000 + x = -0.106186205 + -0.03571428572 x = -0.106186205 + -0.03571428572 Combine like terms: -0.106186205 + -0.03571428572 = -0.14190049072 x = -0.14190049072 Simplifying x = -0.14190049072

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.07047191928, -0.14190049072}

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