7x^2+28x+24=0

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Solution for 7x^2+28x+24=0 equation:


Simplifying
7x2 + 28x + 24 = 0

Reorder the terms:
24 + 28x + 7x2 = 0

Solving
24 + 28x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
3.428571429 + 4x + x2 = 0

Move the constant term to the right:

Add '-3.428571429' to each side of the equation.
3.428571429 + 4x + -3.428571429 + x2 = 0 + -3.428571429

Reorder the terms:
3.428571429 + -3.428571429 + 4x + x2 = 0 + -3.428571429

Combine like terms: 3.428571429 + -3.428571429 = 0.000000000
0.000000000 + 4x + x2 = 0 + -3.428571429
4x + x2 = 0 + -3.428571429

Combine like terms: 0 + -3.428571429 = -3.428571429
4x + x2 = -3.428571429

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = -3.428571429 + 4

Reorder the terms:
4 + 4x + x2 = -3.428571429 + 4

Combine like terms: -3.428571429 + 4 = 0.571428571
4 + 4x + x2 = 0.571428571

Factor a perfect square on the left side:
(x + 2)(x + 2) = 0.571428571

Calculate the square root of the right side: 0.755928946

Break this problem into two subproblems by setting 
(x + 2) equal to 0.755928946 and -0.755928946.

Subproblem 1

x + 2 = 0.755928946 Simplifying x + 2 = 0.755928946 Reorder the terms: 2 + x = 0.755928946 Solving 2 + x = 0.755928946 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0.755928946 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0.755928946 + -2 x = 0.755928946 + -2 Combine like terms: 0.755928946 + -2 = -1.244071054 x = -1.244071054 Simplifying x = -1.244071054

Subproblem 2

x + 2 = -0.755928946 Simplifying x + 2 = -0.755928946 Reorder the terms: 2 + x = -0.755928946 Solving 2 + x = -0.755928946 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -0.755928946 + -2 Combine like terms: 2 + -2 = 0 0 + x = -0.755928946 + -2 x = -0.755928946 + -2 Combine like terms: -0.755928946 + -2 = -2.755928946 x = -2.755928946 Simplifying x = -2.755928946

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.244071054, -2.755928946}

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