Producer of x^(2) -4x-21

Question

Producer of
`x^(2) -4x-21`

Answer 1

(x - 7)(x + 3)

Step-by-step explanation:

`\rightarrow \sf x^2 - 4x - 21`

breakdown

`\rightarrow \sf x^2 - 7x +3x- 21`

factor out common terms

`\rightarrow \sf x(x - 7) +3(x- 7)`

collect into groups

`\rightarrow \sf (x+3)(x- 7)`