Answer:
A
Step-by-step explanation:
49y² - x² ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b) , then
49y² - x²
= (7y)² - x²
= (7y - x )(7y + x) → A
wowza
that looks hard
F(x)=4X X=5
F(5)=4X
4(5)
20
Y=4(20)
Y=80
The first answer and the second answer.
