4x^2+31x-45=3x^2+52x-17

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Solution for 4x^2+31x-45=3x^2+52x-17 equation:


Simplifying
4x2 + 31x + -45 = 3x2 + 52x + -17

Reorder the terms:
-45 + 31x + 4x2 = 3x2 + 52x + -17

Reorder the terms:
-45 + 31x + 4x2 = -17 + 52x + 3x2

Solving
-45 + 31x + 4x2 = -17 + 52x + 3x2

Solving for variable 'x'.

Reorder the terms:
-45 + 17 + 31x + -52x + 4x2 + -3x2 = -17 + 52x + 3x2 + 17 + -52x + -3x2

Combine like terms: -45 + 17 = -28
-28 + 31x + -52x + 4x2 + -3x2 = -17 + 52x + 3x2 + 17 + -52x + -3x2

Combine like terms: 31x + -52x = -21x
-28 + -21x + 4x2 + -3x2 = -17 + 52x + 3x2 + 17 + -52x + -3x2

Combine like terms: 4x2 + -3x2 = 1x2
-28 + -21x + 1x2 = -17 + 52x + 3x2 + 17 + -52x + -3x2

Reorder the terms:
-28 + -21x + 1x2 = -17 + 17 + 52x + -52x + 3x2 + -3x2

Combine like terms: -17 + 17 = 0
-28 + -21x + 1x2 = 0 + 52x + -52x + 3x2 + -3x2
-28 + -21x + 1x2 = 52x + -52x + 3x2 + -3x2

Combine like terms: 52x + -52x = 0
-28 + -21x + 1x2 = 0 + 3x2 + -3x2
-28 + -21x + 1x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-28 + -21x + 1x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '28' to each side of the equation.
-28 + -21x + 28 + x2 = 0 + 28

Reorder the terms:
-28 + 28 + -21x + x2 = 0 + 28

Combine like terms: -28 + 28 = 0
0 + -21x + x2 = 0 + 28
-21x + x2 = 0 + 28

Combine like terms: 0 + 28 = 28
-21x + x2 = 28

The x term is -21x.  Take half its coefficient (-10.5).
Square it (110.25) and add it to both sides.

Add '110.25' to each side of the equation.
-21x + 110.25 + x2 = 28 + 110.25

Reorder the terms:
110.25 + -21x + x2 = 28 + 110.25

Combine like terms: 28 + 110.25 = 138.25
110.25 + -21x + x2 = 138.25

Factor a perfect square on the left side:
(x + -10.5)(x + -10.5) = 138.25

Calculate the square root of the right side: 11.757976016

Break this problem into two subproblems by setting 
(x + -10.5) equal to 11.757976016 and -11.757976016.

Subproblem 1

x + -10.5 = 11.757976016 Simplifying x + -10.5 = 11.757976016 Reorder the terms: -10.5 + x = 11.757976016 Solving -10.5 + x = 11.757976016 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10.5' to each side of the equation. -10.5 + 10.5 + x = 11.757976016 + 10.5 Combine like terms: -10.5 + 10.5 = 0.0 0.0 + x = 11.757976016 + 10.5 x = 11.757976016 + 10.5 Combine like terms: 11.757976016 + 10.5 = 22.257976016 x = 22.257976016 Simplifying x = 22.257976016

Subproblem 2

x + -10.5 = -11.757976016 Simplifying x + -10.5 = -11.757976016 Reorder the terms: -10.5 + x = -11.757976016 Solving -10.5 + x = -11.757976016 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10.5' to each side of the equation. -10.5 + 10.5 + x = -11.757976016 + 10.5 Combine like terms: -10.5 + 10.5 = 0.0 0.0 + x = -11.757976016 + 10.5 x = -11.757976016 + 10.5 Combine like terms: -11.757976016 + 10.5 = -1.257976016 x = -1.257976016 Simplifying x = -1.257976016

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.257976016, -1.257976016}

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