8y-y^2=13

Simple and best practice solution for 8y-y^2=13 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 8y-y^2=13 equation:


Simplifying
8y + -1y2 = 13

Solving
8y + -1y2 = 13

Solving for variable 'y'.

Reorder the terms:
-13 + 8y + -1y2 = 13 + -13

Combine like terms: 13 + -13 = 0
-13 + 8y + -1y2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
13 + -8y + y2 = 0

Move the constant term to the right:

Add '-13' to each side of the equation.
13 + -8y + -13 + y2 = 0 + -13

Reorder the terms:
13 + -13 + -8y + y2 = 0 + -13

Combine like terms: 13 + -13 = 0
0 + -8y + y2 = 0 + -13
-8y + y2 = 0 + -13

Combine like terms: 0 + -13 = -13
-8y + y2 = -13

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 = -13 + 16

Reorder the terms:
16 + -8y + y2 = -13 + 16

Combine like terms: -13 + 16 = 3
16 + -8y + y2 = 3

Factor a perfect square on the left side:
(y + -4)(y + -4) = 3

Calculate the square root of the right side: 1.732050808

Break this problem into two subproblems by setting 
(y + -4) equal to 1.732050808 and -1.732050808.

Subproblem 1

y + -4 = 1.732050808 Simplifying y + -4 = 1.732050808 Reorder the terms: -4 + y = 1.732050808 Solving -4 + y = 1.732050808 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 = 1.732050808 + 4 Combine like terms: -4 + 4 = 0 0 + y = 1.732050808 + 4 y = 1.732050808 + 4 Combine like terms: 1.732050808 + 4 = 5.732050808 y = 5.732050808 Simplifying y = 5.732050808

Subproblem 2

y + -4 = -1.732050808 Simplifying y + -4 = -1.732050808 Reorder the terms: -4 + y = -1.732050808 Solving -4 + y = -1.732050808 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 = -1.732050808 + 4 Combine like terms: -4 + 4 = 0 0 + y = -1.732050808 + 4 y = -1.732050808 + 4 Combine like terms: -1.732050808 + 4 = 2.267949192 y = 2.267949192 Simplifying y = 2.267949192

Solution

The solution to the problem is based on the solutions from the subproblems. y = {5.732050808, 2.267949192}

See similar equations:

| c+u=z | | 2(y+9)+4y=-36 | | 6(6-5a)=-6(8-3a) | | x+17=6x-5 | | b=c-y | | -5(3-13x)+5=12x | | 6(k+7)=-9(k-8) | | 56+4y=-4y | | -7(-2-8p)+12p=6p+10(-10+10p) | | c-z=a | | 3/4x9 | | u=c-a | | 3/4a=9 | | 2(v-8)-4=-(v+5) | | 522/x=3/5 | | 2b+(-9a)+(6y)= | | 10m^2-8m=0 | | x+3x+1x+1x+3= | | 10x-23+7x+1=180 | | 5x+6y(7)=30 | | 7+1/x=2x | | x+3x+1x+1= | | X^2+12x+18=7 | | x+3x+1= | | k/5+5=6 | | 0=2x^2+7x-99 | | 15=6x-3y | | (x2+4x+3)/(x2+x-2) | | (((2x-3)/(4)))+(3)=3x | | ((2x-3)/(4))+(3)=3x | | 75=36-6n-5 | | ((2x-3)/(4))+3=3x |

Equations solver categories