7y^2-43=-35y

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Solution for 7y^2-43=-35y equation:


Simplifying
7y2 + -43 = -35y

Reorder the terms:
-43 + 7y2 = -35y

Solving
-43 + 7y2 = -35y

Solving for variable 'y'.

Reorder the terms:
-43 + 35y + 7y2 = -35y + 35y

Combine like terms: -35y + 35y = 0
-43 + 35y + 7y2 = 0

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

Divide each side by '7'.
-6.142857143 + 5y + y2 = 0

Move the constant term to the right:

Add '6.142857143' to each side of the equation.
-6.142857143 + 5y + 6.142857143 + y2 = 0 + 6.142857143

Reorder the terms:
-6.142857143 + 6.142857143 + 5y + y2 = 0 + 6.142857143

Combine like terms: -6.142857143 + 6.142857143 = 0.000000000
0.000000000 + 5y + y2 = 0 + 6.142857143
5y + y2 = 0 + 6.142857143

Combine like terms: 0 + 6.142857143 = 6.142857143
5y + y2 = 6.142857143

The y term is 5y.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5y + 6.25 + y2 = 6.142857143 + 6.25

Reorder the terms:
6.25 + 5y + y2 = 6.142857143 + 6.25

Combine like terms: 6.142857143 + 6.25 = 12.392857143
6.25 + 5y + y2 = 12.392857143

Factor a perfect square on the left side:
(y + 2.5)(y + 2.5) = 12.392857143

Calculate the square root of the right side: 3.520349009

Break this problem into two subproblems by setting 
(y + 2.5) equal to 3.520349009 and -3.520349009.

Subproblem 1

y + 2.5 = 3.520349009 Simplifying y + 2.5 = 3.520349009 Reorder the terms: 2.5 + y = 3.520349009 Solving 2.5 + y = 3.520349009 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + y = 3.520349009 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + y = 3.520349009 + -2.5 y = 3.520349009 + -2.5 Combine like terms: 3.520349009 + -2.5 = 1.020349009 y = 1.020349009 Simplifying y = 1.020349009

Subproblem 2

y + 2.5 = -3.520349009 Simplifying y + 2.5 = -3.520349009 Reorder the terms: 2.5 + y = -3.520349009 Solving 2.5 + y = -3.520349009 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + y = -3.520349009 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + y = -3.520349009 + -2.5 y = -3.520349009 + -2.5 Combine like terms: -3.520349009 + -2.5 = -6.020349009 y = -6.020349009 Simplifying y = -6.020349009

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.020349009, -6.020349009}

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