20r^2-182r-180=0

Simple and best practice solution for 20r^2-182r-180=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 20r^2-182r-180=0 equation:


Simplifying
20r2 + -182r + -180 = 0

Reorder the terms:
-180 + -182r + 20r2 = 0

Solving
-180 + -182r + 20r2 = 0

Solving for variable 'r'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-90 + -91r + 10r2) = 0

Factor a trinomial.
2((-9 + -10r)(10 + -1r)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-9 + -10r)' equal to zero and attempt to solve: Simplifying -9 + -10r = 0 Solving -9 + -10r = 0 Move all terms containing r to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -10r = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -10r = 0 + 9 -10r = 0 + 9 Combine like terms: 0 + 9 = 9 -10r = 9 Divide each side by '-10'. r = -0.9 Simplifying r = -0.9

Subproblem 2

Set the factor '(10 + -1r)' equal to zero and attempt to solve: Simplifying 10 + -1r = 0 Solving 10 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -1r = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -1r = 0 + -10 -1r = 0 + -10 Combine like terms: 0 + -10 = -10 -1r = -10 Divide each side by '-1'. r = 10 Simplifying r = 10

Solution

r = {-0.9, 10}

See similar equations:

| 1/2x12.8xh=64^2 | | 9v/8x^7*x/7v | | (4x-9)/3=9 | | 5x^2+6=51 | | t^2-90t-1100=0 | | (x-3)(x+2)=126 | | (X+2)(x-3)=126 | | 5u^2+11u+2=0 | | log/8(32)=5log/8 | | ((x-2)/(x-5))-((x)/10-2x))=(1/4) | | r^2+4r-2500=0 | | 3x-4(2x-5)=2-5(x+4) | | 10x^3+15x^2+12x-21=143 | | x=23+ | | (16t^9w^4)^(1/3) | | 3(n+7)=51 | | 6r^2-180r-2400=0 | | (2x-3)(2x^2-4)= | | 8c-3=5c+12 | | X=10.5-1.75y | | (Ab/4z^3)^4 | | 4x^2+120x-256=0 | | 5x^2+12x= | | y=2mx+4b | | y=-4*b+-2*m*x | | xy+9=x+10 | | X-2(x+4)=8(x-3)+2 | | 5t+8(1.3-t)=8 | | (5)=5-y | | (2)=5-y | | (0)=5-y | | 9x=x^2+18 |

Equations solver categories