r^2-10r+8=-8

Simple and best practice solution for r^2-10r+8=-8 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 r^2-10r+8=-8 equation: 


Simplifying
r2 + -10r + 8 = -8

Reorder the terms:
8 + -10r + r2 = -8

Solving
8 + -10r + r2 = -8

Solving for variable 'r'.

Reorder the terms:
8 + 8 + -10r + r2 = -8 + 8

Combine like terms: 8 + 8 = 16
16 + -10r + r2 = -8 + 8

Combine like terms: -8 + 8 = 0
16 + -10r + r2 = 0

Factor a trinomial.
(2 + -1r)(8 + -1r) = 0


Subproblem 1
Set the factor '(2 + -1r)' equal to zero and attempt to solve:

Simplifying
2 + -1r = 0

Solving
2 + -1r = 0

Move all terms containing r to the left, all other terms to the right.

Add '-2' to each side of the equation.
2 + -2 + -1r = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1r = 0 + -2
-1r = 0 + -2

Combine like terms: 0 + -2 = -2
-1r = -2

Divide each side by '-1'.
r = 2

Simplifying
r = 2

Subproblem 2
Set the factor '(8 + -1r)' equal to zero and attempt to solve:

Simplifying
8 + -1r = 0

Solving
8 + -1r = 0

Move all terms containing r to the left, all other terms to the right.

Add '-8' to each side of the equation.
8 + -8 + -1r = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -1r = 0 + -8
-1r = 0 + -8

Combine like terms: 0 + -8 = -8
-1r = -8

Divide each side by '-1'.
r = 8

Simplifying
r = 8
Solution
r = {2, 8}

See similar equations:

| 7x+2=75 | | 600=r+1500 | | -9(u+1)=-3u+9 | | 18x^2+146x+140=0 | | 6-2(10x+2)=5+x | | 5xh=75 | | b*3+.80=4.40 | | 5xn=75 | | -1(x^2)=8 | | 22/16.5 | | 25xn=1000 | | 22.5/5.5 | | 2k^2-162=0 | | -12xn=-168 | | 4(-x+3)=19 | | y+5=53 | | 2x+50=60 | | -25=w/5 | | 8x^3-60x^2+150x=0 | | cos*4*x=0 | | cos(4*x)=0 | | 2x+5-5=25-5 | | 1/4(8(5/2)-20)=(2(5/2)-1)-3 | | (7)(0.5)= | | 20x+5y+1z=100 | | 2(f-1)=4(f-2) | | 7x+16=-2 | | 2x+2.5=7x | | 7y+5=6y-2 | | -5(3n+1)=15 | | 0.4x+18.4=x-4.22 | | sin(2x)*cos(x)=cos(2x)*sin(x) |

Equations solver categories