30x^2-76x-35=0

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Solution for 30x^2-76x-35=0 equation:


Simplifying
30x2 + -76x + -35 = 0

Reorder the terms:
-35 + -76x + 30x2 = 0

Solving
-35 + -76x + 30x2 = 0

Solving for variable 'x'.

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

Divide each side by '30'.
-1.166666667 + -2.533333333x + x2 = 0

Move the constant term to the right:

Add '1.166666667' to each side of the equation.
-1.166666667 + -2.533333333x + 1.166666667 + x2 = 0 + 1.166666667

Reorder the terms:
-1.166666667 + 1.166666667 + -2.533333333x + x2 = 0 + 1.166666667

Combine like terms: -1.166666667 + 1.166666667 = 0.000000000
0.000000000 + -2.533333333x + x2 = 0 + 1.166666667
-2.533333333x + x2 = 0 + 1.166666667

Combine like terms: 0 + 1.166666667 = 1.166666667
-2.533333333x + x2 = 1.166666667

The x term is -2.533333333x.  Take half its coefficient (-1.266666667).
Square it (1.604444445) and add it to both sides.

Add '1.604444445' to each side of the equation.
-2.533333333x + 1.604444445 + x2 = 1.166666667 + 1.604444445

Reorder the terms:
1.604444445 + -2.533333333x + x2 = 1.166666667 + 1.604444445

Combine like terms: 1.166666667 + 1.604444445 = 2.771111112
1.604444445 + -2.533333333x + x2 = 2.771111112

Factor a perfect square on the left side:
(x + -1.266666667)(x + -1.266666667) = 2.771111112

Calculate the square root of the right side: 1.664665465

Break this problem into two subproblems by setting 
(x + -1.266666667) equal to 1.664665465 and -1.664665465.

Subproblem 1

x + -1.266666667 = 1.664665465 Simplifying x + -1.266666667 = 1.664665465 Reorder the terms: -1.266666667 + x = 1.664665465 Solving -1.266666667 + x = 1.664665465 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.266666667' to each side of the equation. -1.266666667 + 1.266666667 + x = 1.664665465 + 1.266666667 Combine like terms: -1.266666667 + 1.266666667 = 0.000000000 0.000000000 + x = 1.664665465 + 1.266666667 x = 1.664665465 + 1.266666667 Combine like terms: 1.664665465 + 1.266666667 = 2.931332132 x = 2.931332132 Simplifying x = 2.931332132

Subproblem 2

x + -1.266666667 = -1.664665465 Simplifying x + -1.266666667 = -1.664665465 Reorder the terms: -1.266666667 + x = -1.664665465 Solving -1.266666667 + x = -1.664665465 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.266666667' to each side of the equation. -1.266666667 + 1.266666667 + x = -1.664665465 + 1.266666667 Combine like terms: -1.266666667 + 1.266666667 = 0.000000000 0.000000000 + x = -1.664665465 + 1.266666667 x = -1.664665465 + 1.266666667 Combine like terms: -1.664665465 + 1.266666667 = -0.397998798 x = -0.397998798 Simplifying x = -0.397998798

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.931332132, -0.397998798}

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