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25-10-2021
Mathematics

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HELP HELP WILL MARK BRAINLIEST

HELP HELP WILL MARK BRAINLIEST class=

Respuesta :

14amavanessa 14amavanessa

25-10-2021

Answer:

b. 10a³ - 11a - 3

Step-by-step explanation:

1. Expand 3(a³ - 2a - 5)

= 3a³ - 6a - 15

2. Add 7a³ - 5a + 12 and 3a³ - 6a - 15

7a³ + 3a³ = 10a³

-5a + -6a = -11a

12 + -15 = -3

3. Answer: b. 10a³ - 11a - 3

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