Question

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

Answer 1

Equivalent

Explanation:

We have

`5(3a^(2) - 2b) + 6 = 5.3 {a}^(2) - 5.2b + 6b \\ = 15 {a}^(2) - 4b`

and

`8 {a}^(2) - 4b + 7 {a}^(2) = 15 {a}^(2) - 4b`

Hence, two expressions are equivalent.

Answer 2

No, they aren't

1: 15a^2-4b

2:15a^2+4b

Explanation: