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
200+80+4+0.3+0.04
Answer: by multiply until you get your sum
2
5
.
4
=
0
9
5.4=0.9x
1
-1,2
4-5=-1
3-1=2
y2-y1
x2-x1
