-4x^2+11x=3

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Solution for -4x^2+11x=3 equation:


Simplifying
-4x2 + 11x = 3

Reorder the terms:
11x + -4x2 = 3

Solving
11x + -4x2 = 3

Solving for variable 'x'.

Reorder the terms:
-3 + 11x + -4x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + 11x + -4x2 = 0

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

Divide each side by '-4'.
0.75 + -2.75x + x2 = 0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + -2.75x + -0.75 + x2 = 0 + -0.75

Reorder the terms:
0.75 + -0.75 + -2.75x + x2 = 0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + -2.75x + x2 = 0 + -0.75
-2.75x + x2 = 0 + -0.75

Combine like terms: 0 + -0.75 = -0.75
-2.75x + x2 = -0.75

The x term is -2.75x.  Take half its coefficient (-1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
-2.75x + 1.890625 + x2 = -0.75 + 1.890625

Reorder the terms:
1.890625 + -2.75x + x2 = -0.75 + 1.890625

Combine like terms: -0.75 + 1.890625 = 1.140625
1.890625 + -2.75x + x2 = 1.140625

Factor a perfect square on the left side:
(x + -1.375)(x + -1.375) = 1.140625

Calculate the square root of the right side: 1.068000468

Break this problem into two subproblems by setting 
(x + -1.375) equal to 1.068000468 and -1.068000468.

Subproblem 1

x + -1.375 = 1.068000468 Simplifying x + -1.375 = 1.068000468 Reorder the terms: -1.375 + x = 1.068000468 Solving -1.375 + x = 1.068000468 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + x = 1.068000468 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + x = 1.068000468 + 1.375 x = 1.068000468 + 1.375 Combine like terms: 1.068000468 + 1.375 = 2.443000468 x = 2.443000468 Simplifying x = 2.443000468

Subproblem 2

x + -1.375 = -1.068000468 Simplifying x + -1.375 = -1.068000468 Reorder the terms: -1.375 + x = -1.068000468 Solving -1.375 + x = -1.068000468 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + x = -1.068000468 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + x = -1.068000468 + 1.375 x = -1.068000468 + 1.375 Combine like terms: -1.068000468 + 1.375 = 0.306999532 x = 0.306999532 Simplifying x = 0.306999532

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.443000468, 0.306999532}

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