2x^2-35x-30=0

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Solution for 2x^2-35x-30=0 equation:


Simplifying
2x2 + -35x + -30 = 0

Reorder the terms:
-30 + -35x + 2x2 = 0

Solving
-30 + -35x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-15 + -17.5x + x2 = 0

Move the constant term to the right:

Add '15' to each side of the equation.
-15 + -17.5x + 15 + x2 = 0 + 15

Reorder the terms:
-15 + 15 + -17.5x + x2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + -17.5x + x2 = 0 + 15
-17.5x + x2 = 0 + 15

Combine like terms: 0 + 15 = 15
-17.5x + x2 = 15

The x term is -17.5x.  Take half its coefficient (-8.75).
Square it (76.5625) and add it to both sides.

Add '76.5625' to each side of the equation.
-17.5x + 76.5625 + x2 = 15 + 76.5625

Reorder the terms:
76.5625 + -17.5x + x2 = 15 + 76.5625

Combine like terms: 15 + 76.5625 = 91.5625
76.5625 + -17.5x + x2 = 91.5625

Factor a perfect square on the left side:
(x + -8.75)(x + -8.75) = 91.5625

Calculate the square root of the right side: 9.568829605

Break this problem into two subproblems by setting 
(x + -8.75) equal to 9.568829605 and -9.568829605.

Subproblem 1

x + -8.75 = 9.568829605 Simplifying x + -8.75 = 9.568829605 Reorder the terms: -8.75 + x = 9.568829605 Solving -8.75 + x = 9.568829605 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.75' to each side of the equation. -8.75 + 8.75 + x = 9.568829605 + 8.75 Combine like terms: -8.75 + 8.75 = 0.00 0.00 + x = 9.568829605 + 8.75 x = 9.568829605 + 8.75 Combine like terms: 9.568829605 + 8.75 = 18.318829605 x = 18.318829605 Simplifying x = 18.318829605

Subproblem 2

x + -8.75 = -9.568829605 Simplifying x + -8.75 = -9.568829605 Reorder the terms: -8.75 + x = -9.568829605 Solving -8.75 + x = -9.568829605 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.75' to each side of the equation. -8.75 + 8.75 + x = -9.568829605 + 8.75 Combine like terms: -8.75 + 8.75 = 0.00 0.00 + x = -9.568829605 + 8.75 x = -9.568829605 + 8.75 Combine like terms: -9.568829605 + 8.75 = -0.818829605 x = -0.818829605 Simplifying x = -0.818829605

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.318829605, -0.818829605}

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