Answer:
9x² -6xy +y²
Step-by-step explanation:
The square of the binomial can be written directly using the relationship ...
(a +b)² = a² +2ab +b²
where you have a=3x and b=-y.
area = (3x -y)² = (3x)² + 2(3x)(-y) + (-y)²
area = 9x² -6xy +y²
The answer is 0.2666 when u convert the fraction.So if I were you I would put B.
√7*12
= √84
= 2√21
answer
C. 2√21
