x^2+3x-4=10

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Solution for x^2+3x-4=10 equation:


Simplifying
x2 + 3x + -4 = 10

Reorder the terms:
-4 + 3x + x2 = 10

Solving
-4 + 3x + x2 = 10

Solving for variable 'x'.

Reorder the terms:
-4 + -10 + 3x + x2 = 10 + -10

Combine like terms: -4 + -10 = -14
-14 + 3x + x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-14 + 3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + 3x + 14 + x2 = 0 + 14

Reorder the terms:
-14 + 14 + 3x + x2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 3x + x2 = 0 + 14
3x + x2 = 0 + 14

Combine like terms: 0 + 14 = 14
3x + x2 = 14

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 = 14 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 14 + 2.25

Combine like terms: 14 + 2.25 = 16.25
2.25 + 3x + x2 = 16.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 16.25

Calculate the square root of the right side: 4.031128874

Break this problem into two subproblems by setting 
(x + 1.5) equal to 4.031128874 and -4.031128874.

Subproblem 1

x + 1.5 = 4.031128874 Simplifying x + 1.5 = 4.031128874 Reorder the terms: 1.5 + x = 4.031128874 Solving 1.5 + x = 4.031128874 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 = 4.031128874 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 4.031128874 + -1.5 x = 4.031128874 + -1.5 Combine like terms: 4.031128874 + -1.5 = 2.531128874 x = 2.531128874 Simplifying x = 2.531128874

Subproblem 2

x + 1.5 = -4.031128874 Simplifying x + 1.5 = -4.031128874 Reorder the terms: 1.5 + x = -4.031128874 Solving 1.5 + x = -4.031128874 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 = -4.031128874 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -4.031128874 + -1.5 x = -4.031128874 + -1.5 Combine like terms: -4.031128874 + -1.5 = -5.531128874 x = -5.531128874 Simplifying x = -5.531128874

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.531128874, -5.531128874}

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