Factor the polynomial.
$x^2-13x+40$

• A. $\(\left\)(x+5\(\right\))\(\left\)(x+8\(\right\))$
• B. $\(\left\)(x-5\(\right\))\(\left\)(x-8\(\right\))$
• C. $\(\left\)(x-4\(\right\))\(\left\)(x-10\(\right\))$
• D. $\(\left\)(x+4\(\right\))\(\left\)(x+10\(\right\))$

Answer: (B)