Factor the trinomial?

Question

-6a^2-ab+7b^2 factor out all common monial first (including -1 if the lead coefficient is negative)

Please help!

Answer 1

-6a^2 - ab + 7b^2

First, factor out (-1), as stated by the question.

(-1) (6a^2 + ab - 7b^2)

Now, factor as per usual methods.

(-1) (6a + 7b)(a - b)

Answer 2

(-1)(6a + 7b)(a - b).

Answer 3

(-1)(6a + 7b)(a - b).

Answer 4

c=a+b3