Answer:
Step-by-step explanation:
In order to factor this you need the quadratic formula. Our a = 1, b = -4, and c = -13 Filling in,
[tex]x=\frac{4+/-\sqrt{16-4(1)(-13)} }{2}[/tex]
which simplifies to
[tex]x=\frac{4+/-\sqrt{68} }{2}[/tex]
which simplifies to
[tex]x=\frac{4+/-2\sqrt{17} }{2}[/tex] which simplifies to
[tex]x=2+/-\sqrt{17}[/tex]
