4x^2-25+20=-6x+8

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Solution for 4x^2-25+20=-6x+8 equation:


Simplifying
4x2 + -25 + 20 = -6x + 8

Reorder the terms:
-25 + 20 + 4x2 = -6x + 8

Combine like terms: -25 + 20 = -5
-5 + 4x2 = -6x + 8

Reorder the terms:
-5 + 4x2 = 8 + -6x

Solving
-5 + 4x2 = 8 + -6x

Solving for variable 'x'.

Reorder the terms:
-5 + -8 + 6x + 4x2 = 8 + -6x + -8 + 6x

Combine like terms: -5 + -8 = -13
-13 + 6x + 4x2 = 8 + -6x + -8 + 6x

Reorder the terms:
-13 + 6x + 4x2 = 8 + -8 + -6x + 6x

Combine like terms: 8 + -8 = 0
-13 + 6x + 4x2 = 0 + -6x + 6x
-13 + 6x + 4x2 = -6x + 6x

Combine like terms: -6x + 6x = 0
-13 + 6x + 4x2 = 0

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

Divide each side by '4'.
-3.25 + 1.5x + x2 = 0

Move the constant term to the right:

Add '3.25' to each side of the equation.
-3.25 + 1.5x + 3.25 + x2 = 0 + 3.25

Reorder the terms:
-3.25 + 3.25 + 1.5x + x2 = 0 + 3.25

Combine like terms: -3.25 + 3.25 = 0.00
0.00 + 1.5x + x2 = 0 + 3.25
1.5x + x2 = 0 + 3.25

Combine like terms: 0 + 3.25 = 3.25
1.5x + x2 = 3.25

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = 3.25 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 3.25 + 0.5625

Combine like terms: 3.25 + 0.5625 = 3.8125
0.5625 + 1.5x + x2 = 3.8125

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 3.8125

Calculate the square root of the right side: 1.952562419

Break this problem into two subproblems by setting 
(x + 0.75) equal to 1.952562419 and -1.952562419.

Subproblem 1

x + 0.75 = 1.952562419 Simplifying x + 0.75 = 1.952562419 Reorder the terms: 0.75 + x = 1.952562419 Solving 0.75 + x = 1.952562419 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 1.952562419 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 1.952562419 + -0.75 x = 1.952562419 + -0.75 Combine like terms: 1.952562419 + -0.75 = 1.202562419 x = 1.202562419 Simplifying x = 1.202562419

Subproblem 2

x + 0.75 = -1.952562419 Simplifying x + 0.75 = -1.952562419 Reorder the terms: 0.75 + x = -1.952562419 Solving 0.75 + x = -1.952562419 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -1.952562419 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -1.952562419 + -0.75 x = -1.952562419 + -0.75 Combine like terms: -1.952562419 + -0.75 = -2.702562419 x = -2.702562419 Simplifying x = -2.702562419

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.202562419, -2.702562419}

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