28edrey01 28edrey01
  • 11-05-2022
  • Mathematics
contestada

Please help. Are the expressions 8a² - 4b + 7a² and 5(3a² - 2b) + 6b equivalent? Explain your reasoning.

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forrealpro111
forrealpro111 forrealpro111
  • 11-05-2022

Answer:

No, they aren't

1: 15a^2-4b

2:15a^2+4b

Step-by-step explanation:

Answer Link
ponton
ponton ponton
  • 11-05-2022

Answer:

Equivalent

Step-by-step explanation:

We have

[tex]5(3a^{2} - 2b) + 6 = 5.3 {a}^{2} - 5.2b + 6b \\ = 15 {a}^{2} - 4b[/tex]

and

[tex]8 {a}^{2} - 4b + 7 {a}^{2} = 15 {a}^{2} - 4b[/tex]

Hence, two expressions are equivalent.

Answer Link

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