2x^2+3x=1225

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Solution for 2x^2+3x=1225 equation:


Simplifying
2x2 + 3x = 1225

Reorder the terms:
3x + 2x2 = 1225

Solving
3x + 2x2 = 1225

Solving for variable 'x'.

Reorder the terms:
-1225 + 3x + 2x2 = 1225 + -1225

Combine like terms: 1225 + -1225 = 0
-1225 + 3x + 2x2 = 0

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

Divide each side by '2'.
-612.5 + 1.5x + x2 = 0

Move the constant term to the right:

Add '612.5' to each side of the equation.
-612.5 + 1.5x + 612.5 + x2 = 0 + 612.5

Reorder the terms:
-612.5 + 612.5 + 1.5x + x2 = 0 + 612.5

Combine like terms: -612.5 + 612.5 = 0.0
0.0 + 1.5x + x2 = 0 + 612.5
1.5x + x2 = 0 + 612.5

Combine like terms: 0 + 612.5 = 612.5
1.5x + x2 = 612.5

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = 612.5 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 612.5 + 0.5625

Combine like terms: 612.5 + 0.5625 = 613.0625
0.5625 + 1.5x + x2 = 613.0625

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 613.0625

Calculate the square root of the right side: 24.76009895

Break this problem into two subproblems by setting 
(x + 0.75) equal to 24.76009895 and -24.76009895.

Subproblem 1

x + 0.75 = 24.76009895 Simplifying x + 0.75 = 24.76009895 Reorder the terms: 0.75 + x = 24.76009895 Solving 0.75 + x = 24.76009895 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 24.76009895 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 24.76009895 + -0.75 x = 24.76009895 + -0.75 Combine like terms: 24.76009895 + -0.75 = 24.01009895 x = 24.01009895 Simplifying x = 24.01009895

Subproblem 2

x + 0.75 = -24.76009895 Simplifying x + 0.75 = -24.76009895 Reorder the terms: 0.75 + x = -24.76009895 Solving 0.75 + x = -24.76009895 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -24.76009895 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -24.76009895 + -0.75 x = -24.76009895 + -0.75 Combine like terms: -24.76009895 + -0.75 = -25.51009895 x = -25.51009895 Simplifying x = -25.51009895

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.01009895, -25.51009895}

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