Practice problem
Remove the radical from the denominator by multiplying by the conjugate: 42−2\frac{4}{\sqrt{2}-2}2−24
42+86\frac{4\sqrt{2}+8}{6}642+8
2−22\frac{2-\sqrt{2}}{2}22−2
−22−4-2\sqrt{2}-4−22−4
22+42\sqrt{2}+422+4
Type a concept, like “slope” or “photosynthesis”.