4x^2-23+9=-7x+2

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Solution for 4x^2-23+9=-7x+2 equation:


Simplifying
4x2 + -23 + 9 = -7x + 2

Reorder the terms:
-23 + 9 + 4x2 = -7x + 2

Combine like terms: -23 + 9 = -14
-14 + 4x2 = -7x + 2

Reorder the terms:
-14 + 4x2 = 2 + -7x

Solving
-14 + 4x2 = 2 + -7x

Solving for variable 'x'.

Reorder the terms:
-14 + -2 + 7x + 4x2 = 2 + -7x + -2 + 7x

Combine like terms: -14 + -2 = -16
-16 + 7x + 4x2 = 2 + -7x + -2 + 7x

Reorder the terms:
-16 + 7x + 4x2 = 2 + -2 + -7x + 7x

Combine like terms: 2 + -2 = 0
-16 + 7x + 4x2 = 0 + -7x + 7x
-16 + 7x + 4x2 = -7x + 7x

Combine like terms: -7x + 7x = 0
-16 + 7x + 4x2 = 0

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

Divide each side by '4'.
-4 + 1.75x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 1.75x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + 1.75x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 1.75x + x2 = 0 + 4
1.75x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
1.75x + x2 = 4

The x term is 1.75x.  Take half its coefficient (0.875).
Square it (0.765625) and add it to both sides.

Add '0.765625' to each side of the equation.
1.75x + 0.765625 + x2 = 4 + 0.765625

Reorder the terms:
0.765625 + 1.75x + x2 = 4 + 0.765625

Combine like terms: 4 + 0.765625 = 4.765625
0.765625 + 1.75x + x2 = 4.765625

Factor a perfect square on the left side:
(x + 0.875)(x + 0.875) = 4.765625

Calculate the square root of the right side: 2.18303115

Break this problem into two subproblems by setting 
(x + 0.875) equal to 2.18303115 and -2.18303115.

Subproblem 1

x + 0.875 = 2.18303115 Simplifying x + 0.875 = 2.18303115 Reorder the terms: 0.875 + x = 2.18303115 Solving 0.875 + x = 2.18303115 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + x = 2.18303115 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + x = 2.18303115 + -0.875 x = 2.18303115 + -0.875 Combine like terms: 2.18303115 + -0.875 = 1.30803115 x = 1.30803115 Simplifying x = 1.30803115

Subproblem 2

x + 0.875 = -2.18303115 Simplifying x + 0.875 = -2.18303115 Reorder the terms: 0.875 + x = -2.18303115 Solving 0.875 + x = -2.18303115 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + x = -2.18303115 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + x = -2.18303115 + -0.875 x = -2.18303115 + -0.875 Combine like terms: -2.18303115 + -0.875 = -3.05803115 x = -3.05803115 Simplifying x = -3.05803115

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.30803115, -3.05803115}

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