2y(8+y)=77

Simple and best practice solution for 2y(8+y)=77 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 2y(8+y)=77 equation:


Simplifying
2y(8 + y) = 77
(8 * 2y + y * 2y) = 77
(16y + 2y2) = 77

Solving
16y + 2y2 = 77

Solving for variable 'y'.

Reorder the terms:
-77 + 16y + 2y2 = 77 + -77

Combine like terms: 77 + -77 = 0
-77 + 16y + 2y2 = 0

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

Divide each side by '2'.
-38.5 + 8y + y2 = 0

Move the constant term to the right:

Add '38.5' to each side of the equation.
-38.5 + 8y + 38.5 + y2 = 0 + 38.5

Reorder the terms:
-38.5 + 38.5 + 8y + y2 = 0 + 38.5

Combine like terms: -38.5 + 38.5 = 0.0
0.0 + 8y + y2 = 0 + 38.5
8y + y2 = 0 + 38.5

Combine like terms: 0 + 38.5 = 38.5
8y + y2 = 38.5

The y term is 8y.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8y + 16 + y2 = 38.5 + 16

Reorder the terms:
16 + 8y + y2 = 38.5 + 16

Combine like terms: 38.5 + 16 = 54.5
16 + 8y + y2 = 54.5

Factor a perfect square on the left side:
(y + 4)(y + 4) = 54.5

Calculate the square root of the right side: 7.38241153

Break this problem into two subproblems by setting 
(y + 4) equal to 7.38241153 and -7.38241153.

Subproblem 1

y + 4 = 7.38241153 Simplifying y + 4 = 7.38241153 Reorder the terms: 4 + y = 7.38241153 Solving 4 + y = 7.38241153 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + y = 7.38241153 + -4 Combine like terms: 4 + -4 = 0 0 + y = 7.38241153 + -4 y = 7.38241153 + -4 Combine like terms: 7.38241153 + -4 = 3.38241153 y = 3.38241153 Simplifying y = 3.38241153

Subproblem 2

y + 4 = -7.38241153 Simplifying y + 4 = -7.38241153 Reorder the terms: 4 + y = -7.38241153 Solving 4 + y = -7.38241153 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + y = -7.38241153 + -4 Combine like terms: 4 + -4 = 0 0 + y = -7.38241153 + -4 y = -7.38241153 + -4 Combine like terms: -7.38241153 + -4 = -11.38241153 y = -11.38241153 Simplifying y = -11.38241153

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.38241153, -11.38241153}

See similar equations:

| 2+ln(x+5)=ln(53e^2) | | -6d=-7d+8 | | 2k=-8-2k | | (-2x-5)(4x+6)=(-2x-5)(11x+1) | | X=45-15 | | 2y+x(8+y)=77 | | 20=-4r | | 5z+3=Z-4 | | 5u-69=u+87 | | 4x^2+3y=34 | | 16=x-3 | | h=-12t+72t | | 10y=-10+9y | | 5x^2+10x-3= | | (9c-2d)(9c-2d)= | | 2x=3x+60 | | 2j=8+3j | | 5(2r-3)=9r+8 | | -5+b=-1 | | 2x-2y=3x+10y | | 6x-74=5x-61 | | 6x-4(5x-2)=3-12 | | 5x-61=6z-74 | | 3(6-x)+2(-x+4)=-4x+29 | | 4s-39=77 | | .32x+x=71536 | | .025x+30=.010(x+30) | | ((x*x)+(x*6))=3 | | 9u+64=3u+100 | | 36N-18=18 | | -10y-6=-7y | | -2=n-18 |

Equations solver categories