9x^2+29x-28=1

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Solution for 9x^2+29x-28=1 equation:


Simplifying
9x2 + 29x + -28 = 1

Reorder the terms:
-28 + 29x + 9x2 = 1

Solving
-28 + 29x + 9x2 = 1

Solving for variable 'x'.

Reorder the terms:
-28 + -1 + 29x + 9x2 = 1 + -1

Combine like terms: -28 + -1 = -29
-29 + 29x + 9x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-29 + 29x + 9x2 = 0

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

Divide each side by '9'.
-3.222222222 + 3.222222222x + x2 = 0

Move the constant term to the right:

Add '3.222222222' to each side of the equation.
-3.222222222 + 3.222222222x + 3.222222222 + x2 = 0 + 3.222222222

Reorder the terms:
-3.222222222 + 3.222222222 + 3.222222222x + x2 = 0 + 3.222222222

Combine like terms: -3.222222222 + 3.222222222 = 0.000000000
0.000000000 + 3.222222222x + x2 = 0 + 3.222222222
3.222222222x + x2 = 0 + 3.222222222

Combine like terms: 0 + 3.222222222 = 3.222222222
3.222222222x + x2 = 3.222222222

The x term is 3.222222222x.  Take half its coefficient (1.611111111).
Square it (2.595679012) and add it to both sides.

Add '2.595679012' to each side of the equation.
3.222222222x + 2.595679012 + x2 = 3.222222222 + 2.595679012

Reorder the terms:
2.595679012 + 3.222222222x + x2 = 3.222222222 + 2.595679012

Combine like terms: 3.222222222 + 2.595679012 = 5.817901234
2.595679012 + 3.222222222x + x2 = 5.817901234

Factor a perfect square on the left side:
(x + 1.611111111)(x + 1.611111111) = 5.817901234

Calculate the square root of the right side: 2.412032594

Break this problem into two subproblems by setting 
(x + 1.611111111) equal to 2.412032594 and -2.412032594.

Subproblem 1

x + 1.611111111 = 2.412032594 Simplifying x + 1.611111111 = 2.412032594 Reorder the terms: 1.611111111 + x = 2.412032594 Solving 1.611111111 + x = 2.412032594 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.611111111' to each side of the equation. 1.611111111 + -1.611111111 + x = 2.412032594 + -1.611111111 Combine like terms: 1.611111111 + -1.611111111 = 0.000000000 0.000000000 + x = 2.412032594 + -1.611111111 x = 2.412032594 + -1.611111111 Combine like terms: 2.412032594 + -1.611111111 = 0.800921483 x = 0.800921483 Simplifying x = 0.800921483

Subproblem 2

x + 1.611111111 = -2.412032594 Simplifying x + 1.611111111 = -2.412032594 Reorder the terms: 1.611111111 + x = -2.412032594 Solving 1.611111111 + x = -2.412032594 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.611111111' to each side of the equation. 1.611111111 + -1.611111111 + x = -2.412032594 + -1.611111111 Combine like terms: 1.611111111 + -1.611111111 = 0.000000000 0.000000000 + x = -2.412032594 + -1.611111111 x = -2.412032594 + -1.611111111 Combine like terms: -2.412032594 + -1.611111111 = -4.023143705 x = -4.023143705 Simplifying x = -4.023143705

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.800921483, -4.023143705}

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