4y^2+56y+49=0

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Solution for 4y^2+56y+49=0 equation:


Simplifying
4y2 + 56y + 49 = 0

Reorder the terms:
49 + 56y + 4y2 = 0

Solving
49 + 56y + 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'.
12.25 + 14y + y2 = 0

Move the constant term to the right:

Add '-12.25' to each side of the equation.
12.25 + 14y + -12.25 + y2 = 0 + -12.25

Reorder the terms:
12.25 + -12.25 + 14y + y2 = 0 + -12.25

Combine like terms: 12.25 + -12.25 = 0.00
0.00 + 14y + y2 = 0 + -12.25
14y + y2 = 0 + -12.25

Combine like terms: 0 + -12.25 = -12.25
14y + y2 = -12.25

The y term is 14y.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14y + 49 + y2 = -12.25 + 49

Reorder the terms:
49 + 14y + y2 = -12.25 + 49

Combine like terms: -12.25 + 49 = 36.75
49 + 14y + y2 = 36.75

Factor a perfect square on the left side:
(y + 7)(y + 7) = 36.75

Calculate the square root of the right side: 6.062177826

Break this problem into two subproblems by setting 
(y + 7) equal to 6.062177826 and -6.062177826.

Subproblem 1

y + 7 = 6.062177826 Simplifying y + 7 = 6.062177826 Reorder the terms: 7 + y = 6.062177826 Solving 7 + y = 6.062177826 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + y = 6.062177826 + -7 Combine like terms: 7 + -7 = 0 0 + y = 6.062177826 + -7 y = 6.062177826 + -7 Combine like terms: 6.062177826 + -7 = -0.937822174 y = -0.937822174 Simplifying y = -0.937822174

Subproblem 2

y + 7 = -6.062177826 Simplifying y + 7 = -6.062177826 Reorder the terms: 7 + y = -6.062177826 Solving 7 + y = -6.062177826 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + y = -6.062177826 + -7 Combine like terms: 7 + -7 = 0 0 + y = -6.062177826 + -7 y = -6.062177826 + -7 Combine like terms: -6.062177826 + -7 = -13.062177826 y = -13.062177826 Simplifying y = -13.062177826

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-0.937822174, -13.062177826}

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