35x^2-77x-6=0

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Solution for 35x^2-77x-6=0 equation:


Simplifying
35x2 + -77x + -6 = 0

Reorder the terms:
-6 + -77x + 35x2 = 0

Solving
-6 + -77x + 35x2 = 0

Solving for variable 'x'.

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

Divide each side by '35'.
-0.1714285714 + -2.2x + x2 = 0

Move the constant term to the right:

Add '0.1714285714' to each side of the equation.
-0.1714285714 + -2.2x + 0.1714285714 + x2 = 0 + 0.1714285714

Reorder the terms:
-0.1714285714 + 0.1714285714 + -2.2x + x2 = 0 + 0.1714285714

Combine like terms: -0.1714285714 + 0.1714285714 = 0.0000000000
0.0000000000 + -2.2x + x2 = 0 + 0.1714285714
-2.2x + x2 = 0 + 0.1714285714

Combine like terms: 0 + 0.1714285714 = 0.1714285714
-2.2x + x2 = 0.1714285714

The x term is -2.2x.  Take half its coefficient (-1.1).
Square it (1.21) and add it to both sides.

Add '1.21' to each side of the equation.
-2.2x + 1.21 + x2 = 0.1714285714 + 1.21

Reorder the terms:
1.21 + -2.2x + x2 = 0.1714285714 + 1.21

Combine like terms: 0.1714285714 + 1.21 = 1.3814285714
1.21 + -2.2x + x2 = 1.3814285714

Factor a perfect square on the left side:
(x + -1.1)(x + -1.1) = 1.3814285714

Calculate the square root of the right side: 1.175341896

Break this problem into two subproblems by setting 
(x + -1.1) equal to 1.175341896 and -1.175341896.

Subproblem 1

x + -1.1 = 1.175341896 Simplifying x + -1.1 = 1.175341896 Reorder the terms: -1.1 + x = 1.175341896 Solving -1.1 + x = 1.175341896 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + x = 1.175341896 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + x = 1.175341896 + 1.1 x = 1.175341896 + 1.1 Combine like terms: 1.175341896 + 1.1 = 2.275341896 x = 2.275341896 Simplifying x = 2.275341896

Subproblem 2

x + -1.1 = -1.175341896 Simplifying x + -1.1 = -1.175341896 Reorder the terms: -1.1 + x = -1.175341896 Solving -1.1 + x = -1.175341896 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + x = -1.175341896 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + x = -1.175341896 + 1.1 x = -1.175341896 + 1.1 Combine like terms: -1.175341896 + 1.1 = -0.075341896 x = -0.075341896 Simplifying x = -0.075341896

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.275341896, -0.075341896}

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