y^2+y-5=0

Simple and best practice solution for y^2+y-5=0 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+y-5=0 equation:


Simplifying
y2 + y + -5 = 0

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

Solving
-5 + y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

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

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

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

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

The y term is y.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
y + 0.25 + y2 = 5 + 0.25

Reorder the terms:
0.25 + y + y2 = 5 + 0.25

Combine like terms: 5 + 0.25 = 5.25
0.25 + y + y2 = 5.25

Factor a perfect square on the left side:
(y + 0.5)(y + 0.5) = 5.25

Calculate the square root of the right side: 2.291287847

Break this problem into two subproblems by setting 
(y + 0.5) equal to 2.291287847 and -2.291287847.

Subproblem 1

y + 0.5 = 2.291287847 Simplifying y + 0.5 = 2.291287847 Reorder the terms: 0.5 + y = 2.291287847 Solving 0.5 + y = 2.291287847 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = 2.291287847 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = 2.291287847 + -0.5 y = 2.291287847 + -0.5 Combine like terms: 2.291287847 + -0.5 = 1.791287847 y = 1.791287847 Simplifying y = 1.791287847

Subproblem 2

y + 0.5 = -2.291287847 Simplifying y + 0.5 = -2.291287847 Reorder the terms: 0.5 + y = -2.291287847 Solving 0.5 + y = -2.291287847 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = -2.291287847 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = -2.291287847 + -0.5 y = -2.291287847 + -0.5 Combine like terms: -2.291287847 + -0.5 = -2.791287847 y = -2.791287847 Simplifying y = -2.791287847

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.791287847, -2.791287847}

See similar equations:

| -(m+3n-15)= | | 1+-2y=-2+3y | | 2/3f-f=-20 | | -3b-24-5=9b+18+1 | | (5x+4)(5x+4)=11 | | 4-3(n-5)=19 | | b^2+5b-15=9 | | 5y-16=34+20 | | x^2-9X+20=-10+2X | | -1/2(x+10)=3/4(x-8) | | 2[8-(w+5)]= | | 100=x-0.1x | | -3b-19=9b+19 | | 7Y^3/9Y^5 | | 3(a+1)-5=3a-3 | | w^2=3w-1 | | 31/3+38/15 | | x^2+9x-1=-9 | | v^2=8v-12 | | 5x/7-x=x/28-3/4 | | -m-6-7m+20=-2 | | 2(14-8)=x | | -8x+(5x-7)=-(4x-2)-9 | | 2v^2+v-1=0 | | 1/4c+1/9c=1/2 | | 10/19*-5/40 | | 2a^2-5ab+3b^2=0 | | c=12500+2.5n | | 12.33-3/4 | | 2(4(x+6)+1)+3x=17 | | 3x^2=32 | | x^2x15/4=-17/4x |

Equations solver categories