2x^2+19x=174

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Solution for 2x^2+19x=174 equation:


Simplifying
2x2 + 19x = 174

Reorder the terms:
19x + 2x2 = 174

Solving
19x + 2x2 = 174

Solving for variable 'x'.

Reorder the terms:
-174 + 19x + 2x2 = 174 + -174

Combine like terms: 174 + -174 = 0
-174 + 19x + 2x2 = 0

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

Divide each side by '2'.
-87 + 9.5x + x2 = 0

Move the constant term to the right:

Add '87' to each side of the equation.
-87 + 9.5x + 87 + x2 = 0 + 87

Reorder the terms:
-87 + 87 + 9.5x + x2 = 0 + 87

Combine like terms: -87 + 87 = 0
0 + 9.5x + x2 = 0 + 87
9.5x + x2 = 0 + 87

Combine like terms: 0 + 87 = 87
9.5x + x2 = 87

The x term is 9.5x.  Take half its coefficient (4.75).
Square it (22.5625) and add it to both sides.

Add '22.5625' to each side of the equation.
9.5x + 22.5625 + x2 = 87 + 22.5625

Reorder the terms:
22.5625 + 9.5x + x2 = 87 + 22.5625

Combine like terms: 87 + 22.5625 = 109.5625
22.5625 + 9.5x + x2 = 109.5625

Factor a perfect square on the left side:
(x + 4.75)(x + 4.75) = 109.5625

Calculate the square root of the right side: 10.467210708

Break this problem into two subproblems by setting 
(x + 4.75) equal to 10.467210708 and -10.467210708.

Subproblem 1

x + 4.75 = 10.467210708 Simplifying x + 4.75 = 10.467210708 Reorder the terms: 4.75 + x = 10.467210708 Solving 4.75 + x = 10.467210708 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = 10.467210708 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = 10.467210708 + -4.75 x = 10.467210708 + -4.75 Combine like terms: 10.467210708 + -4.75 = 5.717210708 x = 5.717210708 Simplifying x = 5.717210708

Subproblem 2

x + 4.75 = -10.467210708 Simplifying x + 4.75 = -10.467210708 Reorder the terms: 4.75 + x = -10.467210708 Solving 4.75 + x = -10.467210708 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = -10.467210708 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = -10.467210708 + -4.75 x = -10.467210708 + -4.75 Combine like terms: -10.467210708 + -4.75 = -15.217210708 x = -15.217210708 Simplifying x = -15.217210708

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.717210708, -15.217210708}

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