5x^2+7x-6-4x^2+5=

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Solution for 5x^2+7x-6-4x^2+5= equation:


Simplifying
5x2 + 7x + -6 + -4x2 + 5 = 0

Reorder the terms:
-6 + 5 + 7x + 5x2 + -4x2 = 0

Combine like terms: -6 + 5 = -1
-1 + 7x + 5x2 + -4x2 = 0

Combine like terms: 5x2 + -4x2 = 1x2
-1 + 7x + 1x2 = 0

Solving
-1 + 7x + 1x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 7x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 7x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 7x + x2 = 0 + 1
7x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
7x + x2 = 1

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = 1 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 1 + 12.25

Combine like terms: 1 + 12.25 = 13.25
12.25 + 7x + x2 = 13.25

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 13.25

Calculate the square root of the right side: 3.640054945

Break this problem into two subproblems by setting 
(x + 3.5) equal to 3.640054945 and -3.640054945.

Subproblem 1

x + 3.5 = 3.640054945 Simplifying x + 3.5 = 3.640054945 Reorder the terms: 3.5 + x = 3.640054945 Solving 3.5 + x = 3.640054945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 3.640054945 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 3.640054945 + -3.5 x = 3.640054945 + -3.5 Combine like terms: 3.640054945 + -3.5 = 0.140054945 x = 0.140054945 Simplifying x = 0.140054945

Subproblem 2

x + 3.5 = -3.640054945 Simplifying x + 3.5 = -3.640054945 Reorder the terms: 3.5 + x = -3.640054945 Solving 3.5 + x = -3.640054945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -3.640054945 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -3.640054945 + -3.5 x = -3.640054945 + -3.5 Combine like terms: -3.640054945 + -3.5 = -7.140054945 x = -7.140054945 Simplifying x = -7.140054945

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.140054945, -7.140054945}

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