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

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


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

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

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

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

Solving for variable 'x'.

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

Combine like terms: -9 + -18 = -27
-27 + -24x + -12x + 25x2 + 7x2 = 18 + 12x + -7x2 + -18 + -12x + 7x2

Combine like terms: -24x + -12x = -36x
-27 + -36x + 25x2 + 7x2 = 18 + 12x + -7x2 + -18 + -12x + 7x2

Combine like terms: 25x2 + 7x2 = 32x2
-27 + -36x + 32x2 = 18 + 12x + -7x2 + -18 + -12x + 7x2

Reorder the terms:
-27 + -36x + 32x2 = 18 + -18 + 12x + -12x + -7x2 + 7x2

Combine like terms: 18 + -18 = 0
-27 + -36x + 32x2 = 0 + 12x + -12x + -7x2 + 7x2
-27 + -36x + 32x2 = 12x + -12x + -7x2 + 7x2

Combine like terms: 12x + -12x = 0
-27 + -36x + 32x2 = 0 + -7x2 + 7x2
-27 + -36x + 32x2 = -7x2 + 7x2

Combine like terms: -7x2 + 7x2 = 0
-27 + -36x + 32x2 = 0

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

Divide each side by '32'.
-0.84375 + -1.125x + x2 = 0

Move the constant term to the right:

Add '0.84375' to each side of the equation.
-0.84375 + -1.125x + 0.84375 + x2 = 0 + 0.84375

Reorder the terms:
-0.84375 + 0.84375 + -1.125x + x2 = 0 + 0.84375

Combine like terms: -0.84375 + 0.84375 = 0.00000
0.00000 + -1.125x + x2 = 0 + 0.84375
-1.125x + x2 = 0 + 0.84375

Combine like terms: 0 + 0.84375 = 0.84375
-1.125x + x2 = 0.84375

The x term is -1.125x.  Take half its coefficient (-0.5625).
Square it (0.31640625) and add it to both sides.

Add '0.31640625' to each side of the equation.
-1.125x + 0.31640625 + x2 = 0.84375 + 0.31640625

Reorder the terms:
0.31640625 + -1.125x + x2 = 0.84375 + 0.31640625

Combine like terms: 0.84375 + 0.31640625 = 1.16015625
0.31640625 + -1.125x + x2 = 1.16015625

Factor a perfect square on the left side:
(x + -0.5625)(x + -0.5625) = 1.16015625

Calculate the square root of the right side: 1.077105496

Break this problem into two subproblems by setting 
(x + -0.5625) equal to 1.077105496 and -1.077105496.

Subproblem 1

x + -0.5625 = 1.077105496 Simplifying x + -0.5625 = 1.077105496 Reorder the terms: -0.5625 + x = 1.077105496 Solving -0.5625 + x = 1.077105496 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + x = 1.077105496 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + x = 1.077105496 + 0.5625 x = 1.077105496 + 0.5625 Combine like terms: 1.077105496 + 0.5625 = 1.639605496 x = 1.639605496 Simplifying x = 1.639605496

Subproblem 2

x + -0.5625 = -1.077105496 Simplifying x + -0.5625 = -1.077105496 Reorder the terms: -0.5625 + x = -1.077105496 Solving -0.5625 + x = -1.077105496 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + x = -1.077105496 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + x = -1.077105496 + 0.5625 x = -1.077105496 + 0.5625 Combine like terms: -1.077105496 + 0.5625 = -0.514605496 x = -0.514605496 Simplifying x = -0.514605496

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.639605496, -0.514605496}

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