x^2+128x+375=750

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Solution for x^2+128x+375=750 equation:


Simplifying
x2 + 128x + 375 = 750

Reorder the terms:
375 + 128x + x2 = 750

Solving
375 + 128x + x2 = 750

Solving for variable 'x'.

Reorder the terms:
375 + -750 + 128x + x2 = 750 + -750

Combine like terms: 375 + -750 = -375
-375 + 128x + x2 = 750 + -750

Combine like terms: 750 + -750 = 0
-375 + 128x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '375' to each side of the equation.
-375 + 128x + 375 + x2 = 0 + 375

Reorder the terms:
-375 + 375 + 128x + x2 = 0 + 375

Combine like terms: -375 + 375 = 0
0 + 128x + x2 = 0 + 375
128x + x2 = 0 + 375

Combine like terms: 0 + 375 = 375
128x + x2 = 375

The x term is 128x.  Take half its coefficient (64).
Square it (4096) and add it to both sides.

Add '4096' to each side of the equation.
128x + 4096 + x2 = 375 + 4096

Reorder the terms:
4096 + 128x + x2 = 375 + 4096

Combine like terms: 375 + 4096 = 4471
4096 + 128x + x2 = 4471

Factor a perfect square on the left side:
(x + 64)(x + 64) = 4471

Calculate the square root of the right side: 66.865536714

Break this problem into two subproblems by setting 
(x + 64) equal to 66.865536714 and -66.865536714.

Subproblem 1

x + 64 = 66.865536714 Simplifying x + 64 = 66.865536714 Reorder the terms: 64 + x = 66.865536714 Solving 64 + x = 66.865536714 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-64' to each side of the equation. 64 + -64 + x = 66.865536714 + -64 Combine like terms: 64 + -64 = 0 0 + x = 66.865536714 + -64 x = 66.865536714 + -64 Combine like terms: 66.865536714 + -64 = 2.865536714 x = 2.865536714 Simplifying x = 2.865536714

Subproblem 2

x + 64 = -66.865536714 Simplifying x + 64 = -66.865536714 Reorder the terms: 64 + x = -66.865536714 Solving 64 + x = -66.865536714 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-64' to each side of the equation. 64 + -64 + x = -66.865536714 + -64 Combine like terms: 64 + -64 = 0 0 + x = -66.865536714 + -64 x = -66.865536714 + -64 Combine like terms: -66.865536714 + -64 = -130.865536714 x = -130.865536714 Simplifying x = -130.865536714

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.865536714, -130.865536714}

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