-12>/5x-9
+9 A Los dos lados
-3>/5x
÷5 Los dos lados
-3/5 >/ x
x </ -3/5
Easy
differnce of 2 perfect squares
a²-b²=(a+b)(a-b)
in this case
x⁴=(x²)²
16=4²
(x²)²-4²=(x²+4)(x²-4)
x²-4 can be factored since 4=2²
x²-2²=(x+2)(x-2)
complete factored form is
(x²+4)(x+2)(x-2)
gegroup to seperate (x+2)
(x+2)[(x²+4)(x-2)]
(x+2)p(x)
p(x)=(x²+4)(x-2)
expanded
p(x)=x³-2x²+4x-8
let's recall that an isosceles triangle has two twin sides.
Check the picture below.
Umm simplified it would be 30t=s. 6*5t=s
Answer:
If the positions are distinct, as in executive offices, then P(9,5)
P(9,5) = 9!/(9 - 5)! = 15120..... is the answer
But...
If the positions are equivalent, such as seats in a legislative body, then C(9,5)
C(9,5) = 9!/[(9 - 5)!(5!)] = 126
Hope this can help you :)
