5x^2+2x^2=80x+32

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Solution for 5x^2+2x^2=80x+32 equation:


Simplifying
5x2 + 2x2 = 80x + 32

Combine like terms: 5x2 + 2x2 = 7x2
7x2 = 80x + 32

Reorder the terms:
7x2 = 32 + 80x

Solving
7x2 = 32 + 80x

Solving for variable 'x'.

Reorder the terms:
-32 + -80x + 7x2 = 32 + 80x + -32 + -80x

Reorder the terms:
-32 + -80x + 7x2 = 32 + -32 + 80x + -80x

Combine like terms: 32 + -32 = 0
-32 + -80x + 7x2 = 0 + 80x + -80x
-32 + -80x + 7x2 = 80x + -80x

Combine like terms: 80x + -80x = 0
-32 + -80x + 7x2 = 0

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

Divide each side by '7'.
-4.571428571 + -11.42857143x + x2 = 0

Move the constant term to the right:

Add '4.571428571' to each side of the equation.
-4.571428571 + -11.42857143x + 4.571428571 + x2 = 0 + 4.571428571

Reorder the terms:
-4.571428571 + 4.571428571 + -11.42857143x + x2 = 0 + 4.571428571

Combine like terms: -4.571428571 + 4.571428571 = 0.000000000
0.000000000 + -11.42857143x + x2 = 0 + 4.571428571
-11.42857143x + x2 = 0 + 4.571428571

Combine like terms: 0 + 4.571428571 = 4.571428571
-11.42857143x + x2 = 4.571428571

The x term is -11.42857143x.  Take half its coefficient (-5.714285715).
Square it (32.65306123) and add it to both sides.

Add '32.65306123' to each side of the equation.
-11.42857143x + 32.65306123 + x2 = 4.571428571 + 32.65306123

Reorder the terms:
32.65306123 + -11.42857143x + x2 = 4.571428571 + 32.65306123

Combine like terms: 4.571428571 + 32.65306123 = 37.224489801
32.65306123 + -11.42857143x + x2 = 37.224489801

Factor a perfect square on the left side:
(x + -5.714285715)(x + -5.714285715) = 37.224489801

Calculate the square root of the right side: 6.101187573

Break this problem into two subproblems by setting 
(x + -5.714285715) equal to 6.101187573 and -6.101187573.

Subproblem 1

x + -5.714285715 = 6.101187573 Simplifying x + -5.714285715 = 6.101187573 Reorder the terms: -5.714285715 + x = 6.101187573 Solving -5.714285715 + x = 6.101187573 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.714285715' to each side of the equation. -5.714285715 + 5.714285715 + x = 6.101187573 + 5.714285715 Combine like terms: -5.714285715 + 5.714285715 = 0.000000000 0.000000000 + x = 6.101187573 + 5.714285715 x = 6.101187573 + 5.714285715 Combine like terms: 6.101187573 + 5.714285715 = 11.815473288 x = 11.815473288 Simplifying x = 11.815473288

Subproblem 2

x + -5.714285715 = -6.101187573 Simplifying x + -5.714285715 = -6.101187573 Reorder the terms: -5.714285715 + x = -6.101187573 Solving -5.714285715 + x = -6.101187573 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.714285715' to each side of the equation. -5.714285715 + 5.714285715 + x = -6.101187573 + 5.714285715 Combine like terms: -5.714285715 + 5.714285715 = 0.000000000 0.000000000 + x = -6.101187573 + 5.714285715 x = -6.101187573 + 5.714285715 Combine like terms: -6.101187573 + 5.714285715 = -0.386901858 x = -0.386901858 Simplifying x = -0.386901858

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.815473288, -0.386901858}

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