(5y-3)+(4y+9)y=

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Solution for (5y-3)+(4y+9)y= equation:


Simplifying
(5y + -3) + (4y + 9) * y = 0

Reorder the terms:
(-3 + 5y) + (4y + 9) * y = 0

Remove parenthesis around (-3 + 5y)
-3 + 5y + (4y + 9) * y = 0

Reorder the terms:
-3 + 5y + (9 + 4y) * y = 0

Reorder the terms for easier multiplication:
-3 + 5y + y(9 + 4y) = 0
-3 + 5y + (9 * y + 4y * y) = 0
-3 + 5y + (9y + 4y2) = 0

Combine like terms: 5y + 9y = 14y
-3 + 14y + 4y2 = 0

Solving
-3 + 14y + 4y2 = 0

Solving for variable 'y'.

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

Divide each side by '4'.
-0.75 + 3.5y + y2 = 0

Move the constant term to the right:

Add '0.75' to each side of the equation.
-0.75 + 3.5y + 0.75 + y2 = 0 + 0.75

Reorder the terms:
-0.75 + 0.75 + 3.5y + y2 = 0 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.00 + 3.5y + y2 = 0 + 0.75
3.5y + y2 = 0 + 0.75

Combine like terms: 0 + 0.75 = 0.75
3.5y + y2 = 0.75

The y term is 3.5y.  Take half its coefficient (1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
3.5y + 3.0625 + y2 = 0.75 + 3.0625

Reorder the terms:
3.0625 + 3.5y + y2 = 0.75 + 3.0625

Combine like terms: 0.75 + 3.0625 = 3.8125
3.0625 + 3.5y + y2 = 3.8125

Factor a perfect square on the left side:
(y + 1.75)(y + 1.75) = 3.8125

Calculate the square root of the right side: 1.952562419

Break this problem into two subproblems by setting 
(y + 1.75) equal to 1.952562419 and -1.952562419.

Subproblem 1

y + 1.75 = 1.952562419 Simplifying y + 1.75 = 1.952562419 Reorder the terms: 1.75 + y = 1.952562419 Solving 1.75 + y = 1.952562419 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + y = 1.952562419 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + y = 1.952562419 + -1.75 y = 1.952562419 + -1.75 Combine like terms: 1.952562419 + -1.75 = 0.202562419 y = 0.202562419 Simplifying y = 0.202562419

Subproblem 2

y + 1.75 = -1.952562419 Simplifying y + 1.75 = -1.952562419 Reorder the terms: 1.75 + y = -1.952562419 Solving 1.75 + y = -1.952562419 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + y = -1.952562419 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + y = -1.952562419 + -1.75 y = -1.952562419 + -1.75 Combine like terms: -1.952562419 + -1.75 = -3.702562419 y = -3.702562419 Simplifying y = -3.702562419

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.202562419, -3.702562419}

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