It's not the difference of squares, rather it is the square of a difference. That leaves a perfect square trinomial, which narrows your selection to two choices. An expression with 2 terms is not a trinomial, so that further narrows your selection. The appropriate choice is
... (4xy -3z)² = 16x²y² -24xyz +9z², a perfect square trinomial
_____
The expression you have in your problem statement has no z term, so none of the choices is applicable to that one.
This is essentially the game mastermind if you want to look up more about it
the first 2 guesses have a number with the correct value and in the right position "bulls", all three guesses start with a 1, so if 1 were correct in the first position the 3rd guess would have a "bull" too
this means either the 6 or 2 from the first guess and the 7 or 5 from the second are correct in the 2nd or 3rd position
in the 3rd guess the 3rd number is a 5 without a "bull" so the 5 in the 2nd guess can't also be the "bull". Because 1 and 5 can't possibly be bulls the only number left is 7 so the code is _7_
Because of this we also know that in the first guess the 2 must be the "bull", as in the second spot only a 7 would be correct and the 1 is incorrect anyways -> the code is _72
"Cows"=right number at wrong position only appeared in the guesses 2 and 3 and we know it's neither the numbers 1 (because of guess 1), 7 (becuse it is a bull in 2) and 6 (because it is only in 3 and not both 2 and 3) -> the only number in guess 2 and 3 left is 5
-> the code is 572
Answer:
A
Step-by-step explanation:
Answers:
Input 0 = Output 25
Input 1 = Output 23
Input 4 = Output 17
Input 7 = Output 11
Equations:
25 = 25 - (2*0)
23 = 25 - (2*1)
17 = 25 - (2*4)
11 = 25 - (2*7)
Don’t know if this is right or not, if it isn’t sorry!
The answer for this question is letter B
