Докажите тождество: x^2+14x-51=(x+17)(x-3).

\[x² + 14x - 51 = (x + 17)(x - 3)\]

\[x^{2} + 14x - 51 =\]

\[= x^{2} - 3x - 51 + 17x\]

\[x^{2} + 14x - 51 =\]

\[= x² + 14x - 51 \Longrightarrow ч.т.д.\]