-4x^2-27x+16=8x+4

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Solution for -4x^2-27x+16=8x+4 equation:


Simplifying
-4x2 + -27x + 16 = 8x + 4

Reorder the terms:
16 + -27x + -4x2 = 8x + 4

Reorder the terms:
16 + -27x + -4x2 = 4 + 8x

Solving
16 + -27x + -4x2 = 4 + 8x

Solving for variable 'x'.

Reorder the terms:
16 + -4 + -27x + -8x + -4x2 = 4 + 8x + -4 + -8x

Combine like terms: 16 + -4 = 12
12 + -27x + -8x + -4x2 = 4 + 8x + -4 + -8x

Combine like terms: -27x + -8x = -35x
12 + -35x + -4x2 = 4 + 8x + -4 + -8x

Reorder the terms:
12 + -35x + -4x2 = 4 + -4 + 8x + -8x

Combine like terms: 4 + -4 = 0
12 + -35x + -4x2 = 0 + 8x + -8x
12 + -35x + -4x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
12 + -35x + -4x2 = 0

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

Divide each side by '-4'.
-3 + 8.75x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 8.75x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + 8.75x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 8.75x + x2 = 0 + 3
8.75x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
8.75x + x2 = 3

The x term is 8.75x.  Take half its coefficient (4.375).
Square it (19.140625) and add it to both sides.

Add '19.140625' to each side of the equation.
8.75x + 19.140625 + x2 = 3 + 19.140625

Reorder the terms:
19.140625 + 8.75x + x2 = 3 + 19.140625

Combine like terms: 3 + 19.140625 = 22.140625
19.140625 + 8.75x + x2 = 22.140625

Factor a perfect square on the left side:
(x + 4.375)(x + 4.375) = 22.140625

Calculate the square root of the right side: 4.705382556

Break this problem into two subproblems by setting 
(x + 4.375) equal to 4.705382556 and -4.705382556.

Subproblem 1

x + 4.375 = 4.705382556 Simplifying x + 4.375 = 4.705382556 Reorder the terms: 4.375 + x = 4.705382556 Solving 4.375 + x = 4.705382556 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.375' to each side of the equation. 4.375 + -4.375 + x = 4.705382556 + -4.375 Combine like terms: 4.375 + -4.375 = 0.000 0.000 + x = 4.705382556 + -4.375 x = 4.705382556 + -4.375 Combine like terms: 4.705382556 + -4.375 = 0.330382556 x = 0.330382556 Simplifying x = 0.330382556

Subproblem 2

x + 4.375 = -4.705382556 Simplifying x + 4.375 = -4.705382556 Reorder the terms: 4.375 + x = -4.705382556 Solving 4.375 + x = -4.705382556 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.375' to each side of the equation. 4.375 + -4.375 + x = -4.705382556 + -4.375 Combine like terms: 4.375 + -4.375 = 0.000 0.000 + x = -4.705382556 + -4.375 x = -4.705382556 + -4.375 Combine like terms: -4.705382556 + -4.375 = -9.080382556 x = -9.080382556 Simplifying x = -9.080382556

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.330382556, -9.080382556}

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