Question

I got -3 - 2a² is that correct?​

Answer 1

`12+5a² \\ -(15-3a²) \\- - - - - \\ - 3 + 8 {a}^(2) \\ - - - - -`

Solution :-

`12+5a²-(15-3a²)\\12+5a²-15+3a²\\12-15+a²(5+3)\\ -3+8a²`

Answer 2

Hey there!

12 + 5a^2 - (15 - 3a^2)

DISTRIBUTE -1 WITHIN the PARENTHESES

= 12 + 5a^2 - 1(15) - 1(-3a^2)

= 12 + 5a^2 - 15 + 3a^2

COMBINE the LIKE TERMS

= (5a^2 - 3a^2) + (12 - 15)

= 5a^2 + 3a^2 + 12 - 15

= 8a^2 - 3

Therefore, your answer is: 8a^2 - 3

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)