x^2+3x=97

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Solution for x^2+3x=97 equation:


Simplifying
x2 + 3x = 97

Reorder the terms:
3x + x2 = 97

Solving
3x + x2 = 97

Solving for variable 'x'.

Reorder the terms:
-97 + 3x + x2 = 97 + -97

Combine like terms: 97 + -97 = 0
-97 + 3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '97' to each side of the equation.
-97 + 3x + 97 + x2 = 0 + 97

Reorder the terms:
-97 + 97 + 3x + x2 = 0 + 97

Combine like terms: -97 + 97 = 0
0 + 3x + x2 = 0 + 97
3x + x2 = 0 + 97

Combine like terms: 0 + 97 = 97
3x + x2 = 97

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 97 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 97 + 2.25

Combine like terms: 97 + 2.25 = 99.25
2.25 + 3x + x2 = 99.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 99.25

Calculate the square root of the right side: 9.962429423

Break this problem into two subproblems by setting 
(x + 1.5) equal to 9.962429423 and -9.962429423.

Subproblem 1

x + 1.5 = 9.962429423 Simplifying x + 1.5 = 9.962429423 Reorder the terms: 1.5 + x = 9.962429423 Solving 1.5 + x = 9.962429423 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 9.962429423 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 9.962429423 + -1.5 x = 9.962429423 + -1.5 Combine like terms: 9.962429423 + -1.5 = 8.462429423 x = 8.462429423 Simplifying x = 8.462429423

Subproblem 2

x + 1.5 = -9.962429423 Simplifying x + 1.5 = -9.962429423 Reorder the terms: 1.5 + x = -9.962429423 Solving 1.5 + x = -9.962429423 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -9.962429423 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -9.962429423 + -1.5 x = -9.962429423 + -1.5 Combine like terms: -9.962429423 + -1.5 = -11.462429423 x = -11.462429423 Simplifying x = -11.462429423

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.462429423, -11.462429423}

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