Evaluate C(9, 3). a)504 b)84 c)60480 d)5040

b

Step-by-step explanation:

Evaluate using the definition

n =

where n ! = n(n - 1)(n - 2)(n - 3)..... × 3 × 2 × 1

Given

9

=

=

=

Cancel 6.5.4.3.2.1 on numerator and denominator, leaving

=

=

= 84 → b

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!