12r^2+17r-40=0

Simple and best practice solution for 12r^2+17r-40=0 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 12r^2+17r-40=0 equation:


Simplifying
12r2 + 17r + -40 = 0

Reorder the terms:
-40 + 17r + 12r2 = 0

Solving
-40 + 17r + 12r2 = 0

Solving for variable 'r'.

Factor a trinomial.
(-8 + -3r)(5 + -4r) = 0

Subproblem 1

Set the factor '(-8 + -3r)' equal to zero and attempt to solve: Simplifying -8 + -3r = 0 Solving -8 + -3r = 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 + -3r = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -3r = 0 + 8 -3r = 0 + 8 Combine like terms: 0 + 8 = 8 -3r = 8 Divide each side by '-3'. r = -2.666666667 Simplifying r = -2.666666667

Subproblem 2

Set the factor '(5 + -4r)' equal to zero and attempt to solve: Simplifying 5 + -4r = 0 Solving 5 + -4r = 0 Move all terms containing r to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -4r = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -4r = 0 + -5 -4r = 0 + -5 Combine like terms: 0 + -5 = -5 -4r = -5 Divide each side by '-4'. r = 1.25 Simplifying r = 1.25

Solution

r = {-2.666666667, 1.25}

See similar equations:

| ln(5+x)=2 | | 8u-3=0 | | 4x-6=20x+2 | | .6(4.8+.9x+.7x)=2.4 | | 7y^3-20y^2-3=0 | | 15t-7-(-8)-9t-(-6t)= | | 8u-5=0 | | ln(x-1)+ln(6)=ln(3x) | | 5.2-.7-.4x+.7x=5.4 | | 6+9*x+8*x= | | 3x-2=3x+4 | | (x+3)(x-2-5i)(x-2+5i)=0 | | 4=x-7.2 | | (x-3)(x-2-5i)(x-2+5i)=0 | | 726=33*x | | 704=32*x | | 3x^2-49x-130= | | -3(22-8)+102=16 | | 825=2500(0.055)t | | 17y=306 | | 42=18+14(t+5) | | 47y=517 | | 108=4.325(b+12.50) | | (9-u)(4+4u)= | | 3.4+.3-x-2x=4.3 | | r(24)=-3 | | 11x+6=6x-9 | | 32y=5344 | | (2x+6)+(9x-5)= | | -8=c(12) | | 5-4y=3 | | 20=q(-5) |

Equations solver categories