2x^2+3x=1120

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Solution for 2x^2+3x=1120 equation:


Simplifying
2x2 + 3x = 1120

Reorder the terms:
3x + 2x2 = 1120

Solving
3x + 2x2 = 1120

Solving for variable 'x'.

Reorder the terms:
-1120 + 3x + 2x2 = 1120 + -1120

Combine like terms: 1120 + -1120 = 0
-1120 + 3x + 2x2 = 0

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

Divide each side by '2'.
-560 + 1.5x + x2 = 0

Move the constant term to the right:

Add '560' to each side of the equation.
-560 + 1.5x + 560 + x2 = 0 + 560

Reorder the terms:
-560 + 560 + 1.5x + x2 = 0 + 560

Combine like terms: -560 + 560 = 0
0 + 1.5x + x2 = 0 + 560
1.5x + x2 = 0 + 560

Combine like terms: 0 + 560 = 560
1.5x + x2 = 560

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 = 560 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 560 + 0.5625

Combine like terms: 560 + 0.5625 = 560.5625
0.5625 + 1.5x + x2 = 560.5625

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 560.5625

Calculate the square root of the right side: 23.676201131

Break this problem into two subproblems by setting 
(x + 0.75) equal to 23.676201131 and -23.676201131.

Subproblem 1

x + 0.75 = 23.676201131 Simplifying x + 0.75 = 23.676201131 Reorder the terms: 0.75 + x = 23.676201131 Solving 0.75 + x = 23.676201131 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 = 23.676201131 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 23.676201131 + -0.75 x = 23.676201131 + -0.75 Combine like terms: 23.676201131 + -0.75 = 22.926201131 x = 22.926201131 Simplifying x = 22.926201131

Subproblem 2

x + 0.75 = -23.676201131 Simplifying x + 0.75 = -23.676201131 Reorder the terms: 0.75 + x = -23.676201131 Solving 0.75 + x = -23.676201131 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 = -23.676201131 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -23.676201131 + -0.75 x = -23.676201131 + -0.75 Combine like terms: -23.676201131 + -0.75 = -24.426201131 x = -24.426201131 Simplifying x = -24.426201131

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.926201131, -24.426201131}

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