Answer:
The player that placed the knight after the first person at the start of the game. There in his turn whatever role the knight played he both had opportunity to space each knight strategically and use the knight to protect whatever wins the game.
Step-by-step explanation:
Maths is 81/80 =1
If -2i is a root, then 2i is also a root. If √10 is a root, then -√10 is also a root. Convert all four of these roots into factors using the factor theorem (which says that if R is a root, then (x - R) is a factor).
(x + 2i) (x - 2i) (x - √10) (x + √10)
Multiply these factors together. (It's easiest to multiply the conjugate pairs together first.):
x^4 - 6x^2 - 40
Answer:
431 and 43
Step-by-step explanation:
Two numbers: y1 and y
Number one: y1 = 10 * y + 1
(10 * y + 1) + y = 474
11y = 473
y = 43
Two numbers: 431 and 43
check: 431 remove 1 (digit) -> 43
431+43=474
Factoring the polynomial 
by grouping means separation of the polynomial in two addends, each of them consists of two addends:
In first brackets the common factor is 
in second brackets the common factor is 
Then
Answer: correct choice is B
