8r^2+31r=4

Simple and best practice solution for 8r^2+31r=4 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 8r^2+31r=4 equation:


Simplifying
8r2 + 31r = 4

Reorder the terms:
31r + 8r2 = 4

Solving
31r + 8r2 = 4

Solving for variable 'r'.

Reorder the terms:
-4 + 31r + 8r2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + 31r + 8r2 = 0

Factor a trinomial.
(-4 + -1r)(1 + -8r) = 0

Subproblem 1

Set the factor '(-4 + -1r)' equal to zero and attempt to solve: Simplifying -4 + -1r = 0 Solving -4 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1r = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1r = 0 + 4 -1r = 0 + 4 Combine like terms: 0 + 4 = 4 -1r = 4 Divide each side by '-1'. r = -4 Simplifying r = -4

Subproblem 2

Set the factor '(1 + -8r)' equal to zero and attempt to solve: Simplifying 1 + -8r = 0 Solving 1 + -8r = 0 Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -8r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -8r = 0 + -1 -8r = 0 + -1 Combine like terms: 0 + -1 = -1 -8r = -1 Divide each side by '-8'. r = 0.125 Simplifying r = 0.125

Solution

r = {-4, 0.125}

See similar equations:

| [-x+3]-[x-5]= | | 6(3z-7)= | | -32=4(-3x+7) | | K^2-4k-2=-5 | | g+24=160 | | a./.5-1=10 | | -0.6(3a)= | | 15-3u=2u | | 3(2+d)=d | | 4x^2+6=106 | | (x^3+4)(x+1)=0 | | 4(d+2)-2d=d | | 39.45=1.4X | | t^2-2t=13 | | 3(3w+7)=78 | | -99=-3(-4x+9) | | 3.57=0.2X | | 4v+1(v-5)=0 | | r^2+28r=-23 | | 3^(7/a) | | 7(3x+4)=56 | | 5(a-2)=45 | | -2c+9=-19 | | g^2+22g-3=0 | | 3^(a/7) | | 12.99=0.5X | | x+3y=147 | | p^2+16p=41 | | p^2+16p=4 | | 15v^2+25v-60=0 | | x+19+x-14=x+51 | | f^2+2f-43=0 |

Equations solver categories