8
-2(x + 5)(x - 6)
k(7k + 9)
You need to look for two numbers, which multiply to 6 and add to 5. Think about the factors of 6: 1 x 6, or 2 x 3, so try 2 & 3. (a + 3)(a + 2) is the solution.
It is: 12(2x+3) when factored
It is: 2(11x+3) when factorized
8
-2(x + 5)(x - 6)
k(7k + 9)
You need to look for two numbers, which multiply to 6 and add to 5. Think about the factors of 6: 1 x 6, or 2 x 3, so try 2 & 3. (a + 3)(a + 2) is the solution.
It is 3(2y+3) when factorized
It is: 12(2x+3) when factored
6
It is: x(x+7) when factorized
I could factorize : (3 + x) (17 + 3 x) But have no idea about the next part...
42
It is (x-3)(x-4) when factored