8x^2+3x=35

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Solution for 8x^2+3x=35 equation:


Simplifying
8x2 + 3x = 35

Reorder the terms:
3x + 8x2 = 35

Solving
3x + 8x2 = 35

Solving for variable 'x'.

Reorder the terms:
-35 + 3x + 8x2 = 35 + -35

Combine like terms: 35 + -35 = 0
-35 + 3x + 8x2 = 0

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

Divide each side by '8'.
-4.375 + 0.375x + x2 = 0

Move the constant term to the right:

Add '4.375' to each side of the equation.
-4.375 + 0.375x + 4.375 + x2 = 0 + 4.375

Reorder the terms:
-4.375 + 4.375 + 0.375x + x2 = 0 + 4.375

Combine like terms: -4.375 + 4.375 = 0.000
0.000 + 0.375x + x2 = 0 + 4.375
0.375x + x2 = 0 + 4.375

Combine like terms: 0 + 4.375 = 4.375
0.375x + x2 = 4.375

The x term is 0.375x.  Take half its coefficient (0.1875).
Square it (0.03515625) and add it to both sides.

Add '0.03515625' to each side of the equation.
0.375x + 0.03515625 + x2 = 4.375 + 0.03515625

Reorder the terms:
0.03515625 + 0.375x + x2 = 4.375 + 0.03515625

Combine like terms: 4.375 + 0.03515625 = 4.41015625
0.03515625 + 0.375x + x2 = 4.41015625

Factor a perfect square on the left side:
(x + 0.1875)(x + 0.1875) = 4.41015625

Calculate the square root of the right side: 2.100037202

Break this problem into two subproblems by setting 
(x + 0.1875) equal to 2.100037202 and -2.100037202.

Subproblem 1

x + 0.1875 = 2.100037202 Simplifying x + 0.1875 = 2.100037202 Reorder the terms: 0.1875 + x = 2.100037202 Solving 0.1875 + x = 2.100037202 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + x = 2.100037202 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + x = 2.100037202 + -0.1875 x = 2.100037202 + -0.1875 Combine like terms: 2.100037202 + -0.1875 = 1.912537202 x = 1.912537202 Simplifying x = 1.912537202

Subproblem 2

x + 0.1875 = -2.100037202 Simplifying x + 0.1875 = -2.100037202 Reorder the terms: 0.1875 + x = -2.100037202 Solving 0.1875 + x = -2.100037202 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + x = -2.100037202 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + x = -2.100037202 + -0.1875 x = -2.100037202 + -0.1875 Combine like terms: -2.100037202 + -0.1875 = -2.287537202 x = -2.287537202 Simplifying x = -2.287537202

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.912537202, -2.287537202}

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