Question

That's the answer... I don't understand how you get -43a and -6

Answer 1

You want the explanation. Or answer?

Answer 2

Distribute 8a by 5a and because there's two a's its a squared then distribute 8a by -6 which gives you -48a then you distribute the positive 1 by 5a which gives you 5a then distribute it the positive 1 by -6 and then combine like terms