56-r=r^2

Simple and best practice solution for 56-r=r^2 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 56-r=r^2 equation:


Simplifying
56 + -1r = r2

Solving
56 + -1r = r2

Solving for variable 'r'.

Combine like terms: r2 + -1r2 = 0
56 + -1r + -1r2 = 0

Factor a trinomial.
(7 + -1r)(8 + r) = 0

Subproblem 1

Set the factor '(7 + -1r)' equal to zero and attempt to solve: Simplifying 7 + -1r = 0 Solving 7 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1r = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1r = 0 + -7 -1r = 0 + -7 Combine like terms: 0 + -7 = -7 -1r = -7 Divide each side by '-1'. r = 7 Simplifying r = 7

Subproblem 2

Set the factor '(8 + r)' equal to zero and attempt to solve: Simplifying 8 + r = 0 Solving 8 + r = 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 + r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + r = 0 + -8 r = 0 + -8 Combine like terms: 0 + -8 = -8 r = -8 Simplifying r = -8

Solution

r = {7, -8}

See similar equations:

| f(x)=-2x^2+4 | | 2*(4z+3)-8=46 | | (6b)^1/2=(8-2b)^1/2 | | 4n^2+40n+96= | | 2x+x^2=48 | | 3(x+5)-11=46 | | N=4/9R | | 5x-55+2= | | 3n-2(4n+1)=0 | | 2x+3y=624 | | -8y+5x-6= | | 8-5f=16-f | | S+3t=27 | | x+(x-20)+(x-40)=180 | | 5(z-3)+4z-1= | | 0.25(3x-8)=(0.5x+4) | | 81+7x+15=180 | | 6(z-3)+4z-1= | | -x+10x-165=96 | | 12x-9=125 | | x-23-x+15=x+115 | | 8x-x=40 | | x+10=x^2-35 | | 10x-28+6x-1+8x-7=180 | | 2y-5+3y-9= | | ln*3+ln*4*x=4 | | 2x+6+3x-10+10x-11=180 | | -3.8t+4=4.4t-3.7 | | 6k-3z=30 | | 10c-6=-16 | | 45=2(4xn)+3 | | x+x/4=8 |

Equations solver categories