y*y-2y=15

Simple and best practice solution for y*y-2y=15 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*y-2y=15 equation:


Simplifying
y * y + -2y = 15

Multiply y * y
y2 + -2y = 15

Reorder the terms:
-2y + y2 = 15

Solving
-2y + y2 = 15

Solving for variable 'y'.

Reorder the terms:
-15 + -2y + y2 = 15 + -15

Combine like terms: 15 + -15 = 0
-15 + -2y + y2 = 0

Factor a trinomial.
(-3 + -1y)(5 + -1y) = 0

Subproblem 1

Set the factor '(-3 + -1y)' equal to zero and attempt to solve: Simplifying -3 + -1y = 0 Solving -3 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1y = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1y = 0 + 3 -1y = 0 + 3 Combine like terms: 0 + 3 = 3 -1y = 3 Divide each side by '-1'. y = -3 Simplifying y = -3

Subproblem 2

Set the factor '(5 + -1y)' equal to zero and attempt to solve: Simplifying 5 + -1y = 0 Solving 5 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1y = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1y = 0 + -5 -1y = 0 + -5 Combine like terms: 0 + -5 = -5 -1y = -5 Divide each side by '-1'. y = 5 Simplifying y = 5

Solution

y = {-3, 5}

See similar equations:

| 19+(x-50)=180 | | 3(2sinx*cosx)=0 | | 5(2+2x)=9(x-5) | | 3/11x=27 | | 16x+3y=8 | | 9x+2x=44 | | 9a^3+21a^2-18a=0 | | 17-9x^2-5=0 | | 6+7m=2+9m | | 6sinx=0 | | 3x^2y+27xy-33y=0 | | 7b+18=b | | 2(n-72)=5(n+3n) | | 3y-15=4x | | 5.8x+64=33.64+8x | | 4u^2+16u=0 | | b-4/6=b/3 | | 2x+2(x+10)=48 | | -49a^2+4606a-52000=42080 | | 4x^-2/(4x)^3 | | =0.5x^2+4x+10 | | -(x+3)=-5-x | | 7.1a+11=96.2 | | -32+17x=11x | | -3(2y+2)-12=-4(y+7)+2y | | -5(4n-5)=30 | | 12u^3+33u^2-60u=0 | | -3x+33=9 | | 5x+28(x-3)=147 | | 3(3x+2)=8(x-4) | | 2(3x^2-10x+40)=0 | | 3z+17=2z+8 |

Equations solver categories