Answer:
the correct answer is $49
C
1/4 inch 1 inch
______ = _____
1 foot 4 feet
3 × 4 = 12
4 × 4 = 16
Step-by-step explanation:
(1+3x-1)×{1-(3x-1)}
=3x.(1-3x+1)
=3x.3x
=9x^2.