9x^2-170x-143=0

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Solution for 9x^2-170x-143=0 equation:


Simplifying
9x2 + -170x + -143 = 0

Reorder the terms:
-143 + -170x + 9x2 = 0

Solving
-143 + -170x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-15.88888889 + -18.88888889x + x2 = 0

Move the constant term to the right:

Add '15.88888889' to each side of the equation.
-15.88888889 + -18.88888889x + 15.88888889 + x2 = 0 + 15.88888889

Reorder the terms:
-15.88888889 + 15.88888889 + -18.88888889x + x2 = 0 + 15.88888889

Combine like terms: -15.88888889 + 15.88888889 = 0.00000000
0.00000000 + -18.88888889x + x2 = 0 + 15.88888889
-18.88888889x + x2 = 0 + 15.88888889

Combine like terms: 0 + 15.88888889 = 15.88888889
-18.88888889x + x2 = 15.88888889

The x term is -18.88888889x.  Take half its coefficient (-9.444444445).
Square it (89.19753087) and add it to both sides.

Add '89.19753087' to each side of the equation.
-18.88888889x + 89.19753087 + x2 = 15.88888889 + 89.19753087

Reorder the terms:
89.19753087 + -18.88888889x + x2 = 15.88888889 + 89.19753087

Combine like terms: 15.88888889 + 89.19753087 = 105.08641976
89.19753087 + -18.88888889x + x2 = 105.08641976

Factor a perfect square on the left side:
(x + -9.444444445)(x + -9.444444445) = 105.08641976

Calculate the square root of the right side: 10.251166751

Break this problem into two subproblems by setting 
(x + -9.444444445) equal to 10.251166751 and -10.251166751.

Subproblem 1

x + -9.444444445 = 10.251166751 Simplifying x + -9.444444445 = 10.251166751 Reorder the terms: -9.444444445 + x = 10.251166751 Solving -9.444444445 + x = 10.251166751 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.444444445' to each side of the equation. -9.444444445 + 9.444444445 + x = 10.251166751 + 9.444444445 Combine like terms: -9.444444445 + 9.444444445 = 0.000000000 0.000000000 + x = 10.251166751 + 9.444444445 x = 10.251166751 + 9.444444445 Combine like terms: 10.251166751 + 9.444444445 = 19.695611196 x = 19.695611196 Simplifying x = 19.695611196

Subproblem 2

x + -9.444444445 = -10.251166751 Simplifying x + -9.444444445 = -10.251166751 Reorder the terms: -9.444444445 + x = -10.251166751 Solving -9.444444445 + x = -10.251166751 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.444444445' to each side of the equation. -9.444444445 + 9.444444445 + x = -10.251166751 + 9.444444445 Combine like terms: -9.444444445 + 9.444444445 = 0.000000000 0.000000000 + x = -10.251166751 + 9.444444445 x = -10.251166751 + 9.444444445 Combine like terms: -10.251166751 + 9.444444445 = -0.806722306 x = -0.806722306 Simplifying x = -0.806722306

Solution

The solution to the problem is based on the solutions from the subproblems. x = {19.695611196, -0.806722306}

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