Variation equation

Solve combinatorics equation:

V(2, x+8)=72

V(2,x+8) is variations, second class, from x+8 items.

Correct answer:

x =  1

Step-by-step explanation:

V(2, x+8)=72 (x+8) (x+7)=72  (x+8) (x+7)=72 x2+15x16=0  a=1;b=15;c=16 D=b24ac=15241(16)=289 D>0  x1,2=2ab±D=215±289 x1,2=215±17 x1,2=7.5±8.5 x1=1 x2=16 x>0 x=x1=1

Our quadratic equation calculator calculates it.

Did you find an error or inaccuracy? Feel free to write us. Thank you!

Tips for related online calculators
Are you looking for help with calculating roots of a quadratic equation?
See also our variations calculator.
Do you have a linear equation or system of equations and are looking for its solution? Or do you have a quadratic equation?
Would you like to compute the count of combinations?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: