Answer:
Step-by-step explanation:
3(2 + 3 + 4)^2
3(9)^2 = 3(81) = 243
Depends on how and what your doing
Answer:
x= -2 y= -1
Step-by-step explanation:
Answer:
Step-by-step explanation:
49b² - 81 = (7b)² - 9 ²
by identity : 49b² - 81 = (7b - 9)( 7b + 9)