4x^2+23x-7=0

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Solution for 4x^2+23x-7=0 equation:


Simplifying
4x2 + 23x + -7 = 0

Reorder the terms:
-7 + 23x + 4x2 = 0

Solving
-7 + 23x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-1.75 + 5.75x + x2 = 0

Move the constant term to the right:

Add '1.75' to each side of the equation.
-1.75 + 5.75x + 1.75 + x2 = 0 + 1.75

Reorder the terms:
-1.75 + 1.75 + 5.75x + x2 = 0 + 1.75

Combine like terms: -1.75 + 1.75 = 0.00
0.00 + 5.75x + x2 = 0 + 1.75
5.75x + x2 = 0 + 1.75

Combine like terms: 0 + 1.75 = 1.75
5.75x + x2 = 1.75

The x term is 5.75x.  Take half its coefficient (2.875).
Square it (8.265625) and add it to both sides.

Add '8.265625' to each side of the equation.
5.75x + 8.265625 + x2 = 1.75 + 8.265625

Reorder the terms:
8.265625 + 5.75x + x2 = 1.75 + 8.265625

Combine like terms: 1.75 + 8.265625 = 10.015625
8.265625 + 5.75x + x2 = 10.015625

Factor a perfect square on the left side:
(x + 2.875)(x + 2.875) = 10.015625

Calculate the square root of the right side: 3.164747225

Break this problem into two subproblems by setting 
(x + 2.875) equal to 3.164747225 and -3.164747225.

Subproblem 1

x + 2.875 = 3.164747225 Simplifying x + 2.875 = 3.164747225 Reorder the terms: 2.875 + x = 3.164747225 Solving 2.875 + x = 3.164747225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + x = 3.164747225 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + x = 3.164747225 + -2.875 x = 3.164747225 + -2.875 Combine like terms: 3.164747225 + -2.875 = 0.289747225 x = 0.289747225 Simplifying x = 0.289747225

Subproblem 2

x + 2.875 = -3.164747225 Simplifying x + 2.875 = -3.164747225 Reorder the terms: 2.875 + x = -3.164747225 Solving 2.875 + x = -3.164747225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + x = -3.164747225 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + x = -3.164747225 + -2.875 x = -3.164747225 + -2.875 Combine like terms: -3.164747225 + -2.875 = -6.039747225 x = -6.039747225 Simplifying x = -6.039747225

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.289747225, -6.039747225}

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