25x^2-24-9=-7x^2+12x-18

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Solution for 25x^2-24-9=-7x^2+12x-18 equation:


Simplifying
25x2 + -24 + -9 = -7x2 + 12x + -18

Reorder the terms:
-24 + -9 + 25x2 = -7x2 + 12x + -18

Combine like terms: -24 + -9 = -33
-33 + 25x2 = -7x2 + 12x + -18

Reorder the terms:
-33 + 25x2 = -18 + 12x + -7x2

Solving
-33 + 25x2 = -18 + 12x + -7x2

Solving for variable 'x'.

Reorder the terms:
-33 + 18 + -12x + 25x2 + 7x2 = -18 + 12x + -7x2 + 18 + -12x + 7x2

Combine like terms: -33 + 18 = -15
-15 + -12x + 25x2 + 7x2 = -18 + 12x + -7x2 + 18 + -12x + 7x2

Combine like terms: 25x2 + 7x2 = 32x2
-15 + -12x + 32x2 = -18 + 12x + -7x2 + 18 + -12x + 7x2

Reorder the terms:
-15 + -12x + 32x2 = -18 + 18 + 12x + -12x + -7x2 + 7x2

Combine like terms: -18 + 18 = 0
-15 + -12x + 32x2 = 0 + 12x + -12x + -7x2 + 7x2
-15 + -12x + 32x2 = 12x + -12x + -7x2 + 7x2

Combine like terms: 12x + -12x = 0
-15 + -12x + 32x2 = 0 + -7x2 + 7x2
-15 + -12x + 32x2 = -7x2 + 7x2

Combine like terms: -7x2 + 7x2 = 0
-15 + -12x + 32x2 = 0

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

Divide each side by '32'.
-0.46875 + -0.375x + x2 = 0

Move the constant term to the right:

Add '0.46875' to each side of the equation.
-0.46875 + -0.375x + 0.46875 + x2 = 0 + 0.46875

Reorder the terms:
-0.46875 + 0.46875 + -0.375x + x2 = 0 + 0.46875

Combine like terms: -0.46875 + 0.46875 = 0.00000
0.00000 + -0.375x + x2 = 0 + 0.46875
-0.375x + x2 = 0 + 0.46875

Combine like terms: 0 + 0.46875 = 0.46875
-0.375x + x2 = 0.46875

The x term is -0.375x.  Take half its coefficient (-0.1875).
Square it (0.03515625) and add it to both sides.

Add '0.03515625' to each side of the equation.
-0.375x + 0.03515625 + x2 = 0.46875 + 0.03515625

Reorder the terms:
0.03515625 + -0.375x + x2 = 0.46875 + 0.03515625

Combine like terms: 0.46875 + 0.03515625 = 0.50390625
0.03515625 + -0.375x + x2 = 0.50390625

Factor a perfect square on the left side:
(x + -0.1875)(x + -0.1875) = 0.50390625

Calculate the square root of the right side: 0.709863543

Break this problem into two subproblems by setting 
(x + -0.1875) equal to 0.709863543 and -0.709863543.

Subproblem 1

x + -0.1875 = 0.709863543 Simplifying x + -0.1875 = 0.709863543 Reorder the terms: -0.1875 + x = 0.709863543 Solving -0.1875 + x = 0.709863543 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1875' to each side of the equation. -0.1875 + 0.1875 + x = 0.709863543 + 0.1875 Combine like terms: -0.1875 + 0.1875 = 0.0000 0.0000 + x = 0.709863543 + 0.1875 x = 0.709863543 + 0.1875 Combine like terms: 0.709863543 + 0.1875 = 0.897363543 x = 0.897363543 Simplifying x = 0.897363543

Subproblem 2

x + -0.1875 = -0.709863543 Simplifying x + -0.1875 = -0.709863543 Reorder the terms: -0.1875 + x = -0.709863543 Solving -0.1875 + x = -0.709863543 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1875' to each side of the equation. -0.1875 + 0.1875 + x = -0.709863543 + 0.1875 Combine like terms: -0.1875 + 0.1875 = 0.0000 0.0000 + x = -0.709863543 + 0.1875 x = -0.709863543 + 0.1875 Combine like terms: -0.709863543 + 0.1875 = -0.522363543 x = -0.522363543 Simplifying x = -0.522363543

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.897363543, -0.522363543}

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