Answer:
3 - 48
Step-by-step explanation:
Given
(a + 2)(3a² + 12)(a - 2)
= (a + 2)(a - 2)(3a² + 12) ← expand the first pair of parenthesis using FOIL
=(a² - 4)(3a² + 12) ← expand using FOIL
= 3 + 12a² - 12a² - 48 ← collect like terms
= 3 - 48
Please help with the question in the attachment. Do not give an improper answer or you will be reported.
1 answer:
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Consider the arithmetic series
Let t=1 in the given series, we get
first term = = 3-4 = -1.
Let t=2 in the given series, we get
second term = =
Let t=3 in the given series, we get
third term =
Now, let t=18 in the given series, we get
last term = l =
We get the series as
-1, 2, 5,..... 50
Sum =
=
=
= 441
Therefore, the sum of the given arithmetic series is 441.