2x^2+35x=45

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Solution for 2x^2+35x=45 equation:


Simplifying
2x2 + 35x = 45

Reorder the terms:
35x + 2x2 = 45

Solving
35x + 2x2 = 45

Solving for variable 'x'.

Reorder the terms:
-45 + 35x + 2x2 = 45 + -45

Combine like terms: 45 + -45 = 0
-45 + 35x + 2x2 = 0

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

Divide each side by '2'.
-22.5 + 17.5x + x2 = 0

Move the constant term to the right:

Add '22.5' to each side of the equation.
-22.5 + 17.5x + 22.5 + x2 = 0 + 22.5

Reorder the terms:
-22.5 + 22.5 + 17.5x + x2 = 0 + 22.5

Combine like terms: -22.5 + 22.5 = 0.0
0.0 + 17.5x + x2 = 0 + 22.5
17.5x + x2 = 0 + 22.5

Combine like terms: 0 + 22.5 = 22.5
17.5x + x2 = 22.5

The x term is 17.5x.  Take half its coefficient (8.75).
Square it (76.5625) and add it to both sides.

Add '76.5625' to each side of the equation.
17.5x + 76.5625 + x2 = 22.5 + 76.5625

Reorder the terms:
76.5625 + 17.5x + x2 = 22.5 + 76.5625

Combine like terms: 22.5 + 76.5625 = 99.0625
76.5625 + 17.5x + x2 = 99.0625

Factor a perfect square on the left side:
(x + 8.75)(x + 8.75) = 99.0625

Calculate the square root of the right side: 9.953014619

Break this problem into two subproblems by setting 
(x + 8.75) equal to 9.953014619 and -9.953014619.

Subproblem 1

x + 8.75 = 9.953014619 Simplifying x + 8.75 = 9.953014619 Reorder the terms: 8.75 + x = 9.953014619 Solving 8.75 + x = 9.953014619 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8.75' to each side of the equation. 8.75 + -8.75 + x = 9.953014619 + -8.75 Combine like terms: 8.75 + -8.75 = 0.00 0.00 + x = 9.953014619 + -8.75 x = 9.953014619 + -8.75 Combine like terms: 9.953014619 + -8.75 = 1.203014619 x = 1.203014619 Simplifying x = 1.203014619

Subproblem 2

x + 8.75 = -9.953014619 Simplifying x + 8.75 = -9.953014619 Reorder the terms: 8.75 + x = -9.953014619 Solving 8.75 + x = -9.953014619 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8.75' to each side of the equation. 8.75 + -8.75 + x = -9.953014619 + -8.75 Combine like terms: 8.75 + -8.75 = 0.00 0.00 + x = -9.953014619 + -8.75 x = -9.953014619 + -8.75 Combine like terms: -9.953014619 + -8.75 = -18.703014619 x = -18.703014619 Simplifying x = -18.703014619

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.203014619, -18.703014619}

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