Question

Determine the factors of x2 − 12x − 20.

(x − 2)(x + 10)

(x − 10)(x + 2)

(x − 5)(x + 4)

Prime

Answer 1

get a replacement for -12x =two numbers when multiplied they give -20 when added give -12

Answer 2

\[x ^{2}-10x-2x-20\\ x(x -10)-2(x -10)\\(x -2) (x -10)\]

Answer 3

Where is my mistake ?

Answer 4

As you can see if we multiply we do we get the original polinomial.

Answer 5

so its prime