2x^2+7x=194

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Solution for 2x^2+7x=194 equation:


Simplifying
2x2 + 7x = 194

Reorder the terms:
7x + 2x2 = 194

Solving
7x + 2x2 = 194

Solving for variable 'x'.

Reorder the terms:
-194 + 7x + 2x2 = 194 + -194

Combine like terms: 194 + -194 = 0
-194 + 7x + 2x2 = 0

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

Divide each side by '2'.
-97 + 3.5x + x2 = 0

Move the constant term to the right:

Add '97' to each side of the equation.
-97 + 3.5x + 97 + x2 = 0 + 97

Reorder the terms:
-97 + 97 + 3.5x + x2 = 0 + 97

Combine like terms: -97 + 97 = 0
0 + 3.5x + x2 = 0 + 97
3.5x + x2 = 0 + 97

Combine like terms: 0 + 97 = 97
3.5x + x2 = 97

The x term is 3.5x.  Take half its coefficient (1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
3.5x + 3.0625 + x2 = 97 + 3.0625

Reorder the terms:
3.0625 + 3.5x + x2 = 97 + 3.0625

Combine like terms: 97 + 3.0625 = 100.0625
3.0625 + 3.5x + x2 = 100.0625

Factor a perfect square on the left side:
(x + 1.75)(x + 1.75) = 100.0625

Calculate the square root of the right side: 10.003124512

Break this problem into two subproblems by setting 
(x + 1.75) equal to 10.003124512 and -10.003124512.

Subproblem 1

x + 1.75 = 10.003124512 Simplifying x + 1.75 = 10.003124512 Reorder the terms: 1.75 + x = 10.003124512 Solving 1.75 + x = 10.003124512 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = 10.003124512 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = 10.003124512 + -1.75 x = 10.003124512 + -1.75 Combine like terms: 10.003124512 + -1.75 = 8.253124512 x = 8.253124512 Simplifying x = 8.253124512

Subproblem 2

x + 1.75 = -10.003124512 Simplifying x + 1.75 = -10.003124512 Reorder the terms: 1.75 + x = -10.003124512 Solving 1.75 + x = -10.003124512 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = -10.003124512 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = -10.003124512 + -1.75 x = -10.003124512 + -1.75 Combine like terms: -10.003124512 + -1.75 = -11.753124512 x = -11.753124512 Simplifying x = -11.753124512

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.253124512, -11.753124512}

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