Question

Which expression is equivalent to x2 - 28x - 60? (X - 30)(x - 2) (x - 30)(x + 2) (x + 30)(x + 2) (x + 30)(x - 2)

Answer 1

`\begin{gathered} x^2-28x-60 \\ \mleft(x^2+2x\mright)+\mleft(-30x-60\mright) \\ x\mleft(x+2\mright)-30\mleft(x+2\mright) \\ \mleft(x+2\mright)\mleft(x-30\mright) \end{gathered}`

answer: the second one