9x^2+0.7x=0.05

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Solution for 9x^2+0.7x=0.05 equation:


Simplifying
9x2 + 0.7x = 0.05

Reorder the terms:
0.7x + 9x2 = 0.05

Solving
0.7x + 9x2 = 0.05

Solving for variable 'x'.

Reorder the terms:
-0.05 + 0.7x + 9x2 = 0.05 + -0.05

Combine like terms: 0.05 + -0.05 = 0.00
-0.05 + 0.7x + 9x2 = 0.00

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

Divide each side by '9'.
-0.005555555556 + 0.07777777778x + x2 = 0.00

Move the constant term to the right:

Add '0.005555555556' to each side of the equation.
-0.005555555556 + 0.07777777778x + 0.005555555556 + x2 = 0.00 + 0.005555555556

Reorder the terms:
-0.005555555556 + 0.005555555556 + 0.07777777778x + x2 = 0.00 + 0.005555555556

Combine like terms: -0.005555555556 + 0.005555555556 = 0.000000000000
0.000000000000 + 0.07777777778x + x2 = 0.00 + 0.005555555556
0.07777777778x + x2 = 0.00 + 0.005555555556

Combine like terms: 0.00 + 0.005555555556 = 0.005555555556
0.07777777778x + x2 = 0.005555555556

The x term is 0.07777777778x.  Take half its coefficient (0.03888888889).
Square it (0.001512345679) and add it to both sides.

Add '0.001512345679' to each side of the equation.
0.07777777778x + 0.001512345679 + x2 = 0.005555555556 + 0.001512345679

Reorder the terms:
0.001512345679 + 0.07777777778x + x2 = 0.005555555556 + 0.001512345679

Combine like terms: 0.005555555556 + 0.001512345679 = 0.007067901235
0.001512345679 + 0.07777777778x + x2 = 0.007067901235

Factor a perfect square on the left side:
(x + 0.03888888889)(x + 0.03888888889) = 0.007067901235

Calculate the square root of the right side: 0.084070811

Break this problem into two subproblems by setting 
(x + 0.03888888889) equal to 0.084070811 and -0.084070811.

Subproblem 1

x + 0.03888888889 = 0.084070811 Simplifying x + 0.03888888889 = 0.084070811 Reorder the terms: 0.03888888889 + x = 0.084070811 Solving 0.03888888889 + x = 0.084070811 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.03888888889' to each side of the equation. 0.03888888889 + -0.03888888889 + x = 0.084070811 + -0.03888888889 Combine like terms: 0.03888888889 + -0.03888888889 = 0.00000000000 0.00000000000 + x = 0.084070811 + -0.03888888889 x = 0.084070811 + -0.03888888889 Combine like terms: 0.084070811 + -0.03888888889 = 0.04518192211 x = 0.04518192211 Simplifying x = 0.04518192211

Subproblem 2

x + 0.03888888889 = -0.084070811 Simplifying x + 0.03888888889 = -0.084070811 Reorder the terms: 0.03888888889 + x = -0.084070811 Solving 0.03888888889 + x = -0.084070811 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.03888888889' to each side of the equation. 0.03888888889 + -0.03888888889 + x = -0.084070811 + -0.03888888889 Combine like terms: 0.03888888889 + -0.03888888889 = 0.00000000000 0.00000000000 + x = -0.084070811 + -0.03888888889 x = -0.084070811 + -0.03888888889 Combine like terms: -0.084070811 + -0.03888888889 = -0.12295969989 x = -0.12295969989 Simplifying x = -0.12295969989

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.04518192211, -0.12295969989}

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