-11x+7=-5x^2+4x

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Solution for -11x+7=-5x^2+4x equation:


Simplifying
-11x + 7 = -5x2 + 4x

Reorder the terms:
7 + -11x = -5x2 + 4x

Reorder the terms:
7 + -11x = 4x + -5x2

Solving
7 + -11x = 4x + -5x2

Solving for variable 'x'.

Combine like terms: -11x + -4x = -15x
7 + -15x + 5x2 = 4x + -5x2 + -4x + 5x2

Reorder the terms:
7 + -15x + 5x2 = 4x + -4x + -5x2 + 5x2

Combine like terms: 4x + -4x = 0
7 + -15x + 5x2 = 0 + -5x2 + 5x2
7 + -15x + 5x2 = -5x2 + 5x2

Combine like terms: -5x2 + 5x2 = 0
7 + -15x + 5x2 = 0

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

Divide each side by '5'.
1.4 + -3x + x2 = 0

Move the constant term to the right:

Add '-1.4' to each side of the equation.
1.4 + -3x + -1.4 + x2 = 0 + -1.4

Reorder the terms:
1.4 + -1.4 + -3x + x2 = 0 + -1.4

Combine like terms: 1.4 + -1.4 = 0.0
0.0 + -3x + x2 = 0 + -1.4
-3x + x2 = 0 + -1.4

Combine like terms: 0 + -1.4 = -1.4
-3x + x2 = -1.4

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 = -1.4 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -1.4 + 2.25

Combine like terms: -1.4 + 2.25 = 0.85
2.25 + -3x + x2 = 0.85

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 0.85

Calculate the square root of the right side: 0.921954446

Break this problem into two subproblems by setting 
(x + -1.5) equal to 0.921954446 and -0.921954446.

Subproblem 1

x + -1.5 = 0.921954446 Simplifying x + -1.5 = 0.921954446 Reorder the terms: -1.5 + x = 0.921954446 Solving -1.5 + x = 0.921954446 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 = 0.921954446 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 0.921954446 + 1.5 x = 0.921954446 + 1.5 Combine like terms: 0.921954446 + 1.5 = 2.421954446 x = 2.421954446 Simplifying x = 2.421954446

Subproblem 2

x + -1.5 = -0.921954446 Simplifying x + -1.5 = -0.921954446 Reorder the terms: -1.5 + x = -0.921954446 Solving -1.5 + x = -0.921954446 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 = -0.921954446 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -0.921954446 + 1.5 x = -0.921954446 + 1.5 Combine like terms: -0.921954446 + 1.5 = 0.578045554 x = 0.578045554 Simplifying x = 0.578045554

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.421954446, 0.578045554}

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