2x^2+25x-30=

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Solution for 2x^2+25x-30= equation:


Simplifying
2x2 + 25x + -30 = 0

Reorder the terms:
-30 + 25x + 2x2 = 0

Solving
-30 + 25x + 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 + 12.5x + x2 = 0

Move the constant term to the right:

Add '15' to each side of the equation.
-15 + 12.5x + 15 + x2 = 0 + 15

Reorder the terms:
-15 + 15 + 12.5x + x2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 12.5x + x2 = 0 + 15
12.5x + x2 = 0 + 15

Combine like terms: 0 + 15 = 15
12.5x + x2 = 15

The x term is 12.5x.  Take half its coefficient (6.25).
Square it (39.0625) and add it to both sides.

Add '39.0625' to each side of the equation.
12.5x + 39.0625 + x2 = 15 + 39.0625

Reorder the terms:
39.0625 + 12.5x + x2 = 15 + 39.0625

Combine like terms: 15 + 39.0625 = 54.0625
39.0625 + 12.5x + x2 = 54.0625

Factor a perfect square on the left side:
(x + 6.25)(x + 6.25) = 54.0625

Calculate the square root of the right side: 7.352720585

Break this problem into two subproblems by setting 
(x + 6.25) equal to 7.352720585 and -7.352720585.

Subproblem 1

x + 6.25 = 7.352720585 Simplifying x + 6.25 = 7.352720585 Reorder the terms: 6.25 + x = 7.352720585 Solving 6.25 + x = 7.352720585 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.25' to each side of the equation. 6.25 + -6.25 + x = 7.352720585 + -6.25 Combine like terms: 6.25 + -6.25 = 0.00 0.00 + x = 7.352720585 + -6.25 x = 7.352720585 + -6.25 Combine like terms: 7.352720585 + -6.25 = 1.102720585 x = 1.102720585 Simplifying x = 1.102720585

Subproblem 2

x + 6.25 = -7.352720585 Simplifying x + 6.25 = -7.352720585 Reorder the terms: 6.25 + x = -7.352720585 Solving 6.25 + x = -7.352720585 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.25' to each side of the equation. 6.25 + -6.25 + x = -7.352720585 + -6.25 Combine like terms: 6.25 + -6.25 = 0.00 0.00 + x = -7.352720585 + -6.25 x = -7.352720585 + -6.25 Combine like terms: -7.352720585 + -6.25 = -13.602720585 x = -13.602720585 Simplifying x = -13.602720585

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.102720585, -13.602720585}

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