15r^2+28r-32=0

Simple and best practice solution for 15r^2+28r-32=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 15r^2+28r-32=0 equation:


Simplifying
15r2 + 28r + -32 = 0

Reorder the terms:
-32 + 28r + 15r2 = 0

Solving
-32 + 28r + 15r2 = 0

Solving for variable 'r'.

Factor a trinomial.
(-8 + -3r)(4 + -5r) = 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 '(4 + -5r)' equal to zero and attempt to solve: Simplifying 4 + -5r = 0 Solving 4 + -5r = 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 + -5r = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -5r = 0 + -4 -5r = 0 + -4 Combine like terms: 0 + -4 = -4 -5r = -4 Divide each side by '-5'. r = 0.8 Simplifying r = 0.8

Solution

r = {-2.666666667, 0.8}

See similar equations:

| 3a+2b=4 | | exp(x)=1 | | 2n+1=0 | | 12-4n=12-4n | | s^2-65-40=0 | | 2(2x+4)-5= | | 7x^2+17-24=12-2x | | 10x=2.5(x+30) | | (12w+7)(5w-15)=0 | | -150-6(25)=x | | 12-96= | | 7(h+3)=-4(-f+2) | | -2=22x | | 12u^2-17u+6= | | -250=-150-6x | | 250+14h=350+33h | | 10s^2-29s+10= | | 8-6x(9-4)= | | 250+14h=22+h | | 4x=y+3 | | 1/4(-x-8)=45 | | g-2=1g+.50 | | 6(x+4)=60 | | r=xw-xw^2 | | 9-9=10x+3x | | 7a^2-63a+140= | | p-3=3p+11 | | 7a^2-63+140= | | 3-8=2x | | 100t=50 | | 5y-10=2y-10 | | 100=20e |

Equations solver categories