4x^2-31x+30=8x+2

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Solution for 4x^2-31x+30=8x+2 equation:


Simplifying
4x2 + -31x + 30 = 8x + 2

Reorder the terms:
30 + -31x + 4x2 = 8x + 2

Reorder the terms:
30 + -31x + 4x2 = 2 + 8x

Solving
30 + -31x + 4x2 = 2 + 8x

Solving for variable 'x'.

Reorder the terms:
30 + -2 + -31x + -8x + 4x2 = 2 + 8x + -2 + -8x

Combine like terms: 30 + -2 = 28
28 + -31x + -8x + 4x2 = 2 + 8x + -2 + -8x

Combine like terms: -31x + -8x = -39x
28 + -39x + 4x2 = 2 + 8x + -2 + -8x

Reorder the terms:
28 + -39x + 4x2 = 2 + -2 + 8x + -8x

Combine like terms: 2 + -2 = 0
28 + -39x + 4x2 = 0 + 8x + -8x
28 + -39x + 4x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
28 + -39x + 4x2 = 0

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

Divide each side by '4'.
7 + -9.75x + x2 = 0

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + -9.75x + -7 + x2 = 0 + -7

Reorder the terms:
7 + -7 + -9.75x + x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -9.75x + x2 = 0 + -7
-9.75x + x2 = 0 + -7

Combine like terms: 0 + -7 = -7
-9.75x + x2 = -7

The x term is -9.75x.  Take half its coefficient (-4.875).
Square it (23.765625) and add it to both sides.

Add '23.765625' to each side of the equation.
-9.75x + 23.765625 + x2 = -7 + 23.765625

Reorder the terms:
23.765625 + -9.75x + x2 = -7 + 23.765625

Combine like terms: -7 + 23.765625 = 16.765625
23.765625 + -9.75x + x2 = 16.765625

Factor a perfect square on the left side:
(x + -4.875)(x + -4.875) = 16.765625

Calculate the square root of the right side: 4.094584839

Break this problem into two subproblems by setting 
(x + -4.875) equal to 4.094584839 and -4.094584839.

Subproblem 1

x + -4.875 = 4.094584839 Simplifying x + -4.875 = 4.094584839 Reorder the terms: -4.875 + x = 4.094584839 Solving -4.875 + x = 4.094584839 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.875' to each side of the equation. -4.875 + 4.875 + x = 4.094584839 + 4.875 Combine like terms: -4.875 + 4.875 = 0.000 0.000 + x = 4.094584839 + 4.875 x = 4.094584839 + 4.875 Combine like terms: 4.094584839 + 4.875 = 8.969584839 x = 8.969584839 Simplifying x = 8.969584839

Subproblem 2

x + -4.875 = -4.094584839 Simplifying x + -4.875 = -4.094584839 Reorder the terms: -4.875 + x = -4.094584839 Solving -4.875 + x = -4.094584839 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.875' to each side of the equation. -4.875 + 4.875 + x = -4.094584839 + 4.875 Combine like terms: -4.875 + 4.875 = 0.000 0.000 + x = -4.094584839 + 4.875 x = -4.094584839 + 4.875 Combine like terms: -4.094584839 + 4.875 = 0.780415161 x = 0.780415161 Simplifying x = 0.780415161

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.969584839, 0.780415161}

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