Question

solve a2-9a-36

Answer 1

(a - )(a + )
need the factors of 36 to add up to -9

-36 + 1 = -35
-6 + 6 = 0
-12 + 3 = -9

(a - 12)(a + 3)

Answer 2

a is -3 or 12

Answer 3

\[a^2 - 9a -36 = (a + 3)(a - 12)\]

Answer 4

Do you understand, it's not the form you issue it in. As Hunus already mentioned.

Answer 5

You're basically finding the factors of -36 that add up to -9.

Answer 6

You can see +3 - 12 = -9

Answer 7

thanks