2x^2+3x=150

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Solution for 2x^2+3x=150 equation:


Simplifying
2x2 + 3x = 150

Reorder the terms:
3x + 2x2 = 150

Solving
3x + 2x2 = 150

Solving for variable 'x'.

Reorder the terms:
-150 + 3x + 2x2 = 150 + -150

Combine like terms: 150 + -150 = 0
-150 + 3x + 2x2 = 0

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

Divide each side by '2'.
-75 + 1.5x + x2 = 0

Move the constant term to the right:

Add '75' to each side of the equation.
-75 + 1.5x + 75 + x2 = 0 + 75

Reorder the terms:
-75 + 75 + 1.5x + x2 = 0 + 75

Combine like terms: -75 + 75 = 0
0 + 1.5x + x2 = 0 + 75
1.5x + x2 = 0 + 75

Combine like terms: 0 + 75 = 75
1.5x + x2 = 75

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 = 75 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 75 + 0.5625

Combine like terms: 75 + 0.5625 = 75.5625
0.5625 + 1.5x + x2 = 75.5625

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 75.5625

Calculate the square root of the right side: 8.692669325

Break this problem into two subproblems by setting 
(x + 0.75) equal to 8.692669325 and -8.692669325.

Subproblem 1

x + 0.75 = 8.692669325 Simplifying x + 0.75 = 8.692669325 Reorder the terms: 0.75 + x = 8.692669325 Solving 0.75 + x = 8.692669325 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 = 8.692669325 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 8.692669325 + -0.75 x = 8.692669325 + -0.75 Combine like terms: 8.692669325 + -0.75 = 7.942669325 x = 7.942669325 Simplifying x = 7.942669325

Subproblem 2

x + 0.75 = -8.692669325 Simplifying x + 0.75 = -8.692669325 Reorder the terms: 0.75 + x = -8.692669325 Solving 0.75 + x = -8.692669325 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 = -8.692669325 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -8.692669325 + -0.75 x = -8.692669325 + -0.75 Combine like terms: -8.692669325 + -0.75 = -9.442669325 x = -9.442669325 Simplifying x = -9.442669325

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.942669325, -9.442669325}

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