Answer:
iii. (l + m - n)(l - m + n)
vi. (5a -b) ( 5b - a)
Step-by-step explanation:
iii. l² - (m - n)²
= (l + m - n)(l - m + n)
vi. 4(a+b)² - 9(a-b)²
= (2(a+b))² - (3(a-b))²
= (2(a+b) + 3(a-b)) (2(a+b) - 3(a-b))
= (2a+2b + 3a - 3b) (2a+2b - 3a + 3b)
= (5a -b) ( 5b - a)
Answer:
-2-2-28
-2-2-2'&&&---6223,357%35372273753857270%
15 tape players in 6 hrs = 15/6 = 2.5 tape players per hr
for 40 hrs...
2.5 * 40 = 100 <=== the worker can complete 100 tape players in 40 hrs