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 = 0.701562119 y = 0.701562119 Simplifying y = 0.701562119

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 = -5.701562119 y = -5.701562119 Simplifying y = -5.701562119

Solution

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

See similar equations:

| 43546+64567= | | 43546/64567= | | 2+2y+10+2= | | 7-9x=-69+5x-10 | | .05x-.03=1.8 | | 2x+5y=-32 | | -5*+1=-2*-8 | | 127-7x=11x+23 | | 2x+20=32 | | 102-5x=31x+18 | | (9X^2-7X-5)=(-5+9X+15X^2) | | x^3*x*x^5= | | 10x+-8=18 | | x=5y-1 | | 0.4x-0.3=-0.14 | | 5/7=x | | -96-9x=7x+24 | | -96-9x=145-35x | | 21-(-4)y=5 | | -5x+1=-2x-8 | | 1+x=x+1 | | 21-(-4y)=5 | | -12-4x=12-10x | | 35-15+15/3= | | 3x+2=8+3x | | t+5=0 | | 0.5y=-10 | | 11x-8=69 | | 17x+2=49 | | 20-26=-6x | | 13x+8=86 | | 10x-8=32 |

Equations solver categories