y^2-5y-4=

Simple and best practice solution for y^2-5y-4= 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 y^2-5y-4= equation:


Simplifying
y2 + -5y + -4 = 0

Reorder the terms:
-4 + -5y + y2 = 0

Solving
-4 + -5y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -5y + 4 + y2 = 0 + 4

Reorder the terms:
-4 + 4 + -5y + y2 = 0 + 4

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

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

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 = 4 + 6.25

Reorder the terms:
6.25 + -5y + y2 = 4 + 6.25

Combine like terms: 4 + 6.25 = 10.25
6.25 + -5y + y2 = 10.25

Factor a perfect square on the left side:
(y + -2.5)(y + -2.5) = 10.25

Calculate the square root of the right side: 3.201562119

Break this problem into two subproblems by setting 
(y + -2.5) equal to 3.201562119 and -3.201562119.

Subproblem 1

y + -2.5 = 3.201562119 Simplifying y + -2.5 = 3.201562119 Reorder the terms: -2.5 + y = 3.201562119 Solving -2.5 + y = 3.201562119 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 = 3.201562119 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + y = 3.201562119 + 2.5 y = 3.201562119 + 2.5 Combine like terms: 3.201562119 + 2.5 = 5.701562119 y = 5.701562119 Simplifying y = 5.701562119

Subproblem 2

y + -2.5 = -3.201562119 Simplifying y + -2.5 = -3.201562119 Reorder the terms: -2.5 + y = -3.201562119 Solving -2.5 + y = -3.201562119 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 = -3.201562119 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + y = -3.201562119 + 2.5 y = -3.201562119 + 2.5 Combine like terms: -3.201562119 + 2.5 = -0.701562119 y = -0.701562119 Simplifying y = -0.701562119

Solution

The solution to the problem is based on the solutions from the subproblems. y = {5.701562119, -0.701562119}

See similar equations:

| 4(4x^2+12x+9)=0 | | 4x^2-24x+45=0 | | y-0.7=5(x-0.2) | | abs(abs(4x+7)-19)=8 | | y^2=-5y+4 | | s=2(3.14)rh+2(3.14)r*r | | x^2-8x-4=-7x-2 | | 5x-26=14-5x | | 1y=12-0.25x | | p^2+2p-3=0 | | 2=8 | | x^2+8x+22=10 | | x^2+8x+22=0 | | x-6-4x=1-5x-8 | | y-7=.3333333(x-9) | | 0.25+20=21.25 | | 2*=8 | | 5n^2+4n+2=0 | | 3n^2-3n+1=0 | | (139.50*1.06)1.18=d | | Y=1.6x+8 | | 9k^2+16=0 | | (4)(x^3)=52 | | 2x+4+3x-1=18 | | 3d-4d=7d+6 | | 2y-9x=14 | | -4x^2+12x+40=0 | | 0.83x+2=0.8x-3 | | x^4-53x^2+196=0 | | 2x+3(-x)-5=2x+10 | | 4x^3=52 | | 8m=6s+2m |

Equations solver categories