Question

(9!)(4!)/(7!)(2!) Evaluate

Answer 1

3456

Answer 2

u kno google can insta tell u these answers

Answer 3

\[\frac{ 9! \times 4! }{ 7! \times 2! }\]
\[\frac{ 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 \times 4 \times 3 \times 2 \times 1 }{ 2 \times 1 \times 7\times 6\times 5\times 4\times 3\times 2\times 1 }\]

Answer 4

cancel out numbers.

Answer 5

and you get 864

Answer 6

@hahd ur wrong my man.
@SpecialMathStudent i would double check your work if i were you.

Answer 7

you probably used
https://www.wolframalpha.com/input/?i=%289!%29%284!%29+%2F+%287!%29%282!%29

Answer 8

lol im not wrong the way he arranged the brackets im perfectly correct

Answer 9

i got 864 also

Answer 10

took me a lil bit but i got it..

Answer 11

yeah me too

Answer 12

thanks guys for the help

Answer 13

=)

Answer 14

@hahd there are no brackets? Only parenthesis.

Answer 15

and its not confusing?

Answer 16

lol ok

Answer 17

\[\frac{\color{teal}{9!}\times\color{orange}{4!}}{\color{brown}{7!}\times\color{cornflowerblue}{2!}}=\frac{\color{teal}{9\times8\times7!}\times\color{orange}{4\times3\times2!}}{\color{brown}{7!}\times\color{cornflowerblue}{2!}}=\color{teal}{9\times8}\times\color{orange}{4\times3}\]

Answer 18

@UnkleRhaukus lol that is what i did :P

Answer 19

Yes, same method, but it's a little simpler looking if you dont expand all of the factorials , because you know they are gonna cancel anyways,

Answer 20

yeah but i wanted to show the user who answered the question like step by step, just in case he wanted to see where i got all the numbers. :)

Answer 21

who asked*

Answer 22

nice colorful text though ;) lol

Answer 23

you method is better for someone who dosent understand the notation very well, so i am very glad you used it,
i was just showing the simplest way to solve, once you do understand.
i probably wouldn't have left my answer as is, if your full expansion wasn't there already. [the solutions are complementary]

Answer 24

haha yeah i usually don't even expand that long, i either do what you do, or just use my calc. :D

Answer 25

But good job @UnkleRhaukus :)