5y^2+16y=3

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Solution for 5y^2+16y=3 equation:


Simplifying
5y2 + 16y = 3

Reorder the terms:
16y + 5y2 = 3

Solving
16y + 5y2 = 3

Solving for variable 'y'.

Reorder the terms:
-3 + 16y + 5y2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + 16y + 5y2 = 0

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

Divide each side by '5'.
-0.6 + 3.2y + y2 = 0

Move the constant term to the right:

Add '0.6' to each side of the equation.
-0.6 + 3.2y + 0.6 + y2 = 0 + 0.6

Reorder the terms:
-0.6 + 0.6 + 3.2y + y2 = 0 + 0.6

Combine like terms: -0.6 + 0.6 = 0.0
0.0 + 3.2y + y2 = 0 + 0.6
3.2y + y2 = 0 + 0.6

Combine like terms: 0 + 0.6 = 0.6
3.2y + y2 = 0.6

The y term is 3.2y.  Take half its coefficient (1.6).
Square it (2.56) and add it to both sides.

Add '2.56' to each side of the equation.
3.2y + 2.56 + y2 = 0.6 + 2.56

Reorder the terms:
2.56 + 3.2y + y2 = 0.6 + 2.56

Combine like terms: 0.6 + 2.56 = 3.16
2.56 + 3.2y + y2 = 3.16

Factor a perfect square on the left side:
(y + 1.6)(y + 1.6) = 3.16

Calculate the square root of the right side: 1.777638883

Break this problem into two subproblems by setting 
(y + 1.6) equal to 1.777638883 and -1.777638883.

Subproblem 1

y + 1.6 = 1.777638883 Simplifying y + 1.6 = 1.777638883 Reorder the terms: 1.6 + y = 1.777638883 Solving 1.6 + y = 1.777638883 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.6' to each side of the equation. 1.6 + -1.6 + y = 1.777638883 + -1.6 Combine like terms: 1.6 + -1.6 = 0.0 0.0 + y = 1.777638883 + -1.6 y = 1.777638883 + -1.6 Combine like terms: 1.777638883 + -1.6 = 0.177638883 y = 0.177638883 Simplifying y = 0.177638883

Subproblem 2

y + 1.6 = -1.777638883 Simplifying y + 1.6 = -1.777638883 Reorder the terms: 1.6 + y = -1.777638883 Solving 1.6 + y = -1.777638883 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.6' to each side of the equation. 1.6 + -1.6 + y = -1.777638883 + -1.6 Combine like terms: 1.6 + -1.6 = 0.0 0.0 + y = -1.777638883 + -1.6 y = -1.777638883 + -1.6 Combine like terms: -1.777638883 + -1.6 = -3.377638883 y = -3.377638883 Simplifying y = -3.377638883

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.177638883, -3.377638883}

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