Question

Factors of 4 - 4 (x – y) + (x – y)² areOPTION A:(4 + x – y) (4 + x – y)OPTION B:(2 + x – y)(2 + x – y)OPTION C:(2 – x + y) (2 – x + y)OPTION D:none of these​

Answer 1

Answer:

$by \: using \: identity \\ {a}^{2} - 2ab + {b}^{2} = {(a - b)}^{2} \\ where \: \\ {a}^{2} = 4 \: = > a = 2 \\ {b}^{2} = {(x - y)}^{2} \\ then \\ 4 - 4(x - y) + {(x - y)}^{2} \\ = {2}^{2} - 2 \times 2 \times (x - y) + (x - y) ^{2} \\ = (2 - x + y) ^{2}$

Answer 2

Answer:

Components of a nuclear reactor. Uranium is the basic fuel. Usually pellets of uranium oxide (UO2) are arranged in tubes to form fuel rods. ... Restarting a reactor with some used fuel may not require this, as there may be enough neutrons to achieve criticality when control rods are removed.