Practice problem
After you Rationalize the denominator, what does the expression 3x2+7 \dfrac{3x}{2+\sqrt7}\;2+73x look like?
x7−2x11\dfrac{x\sqrt7-2x}{11}11x7−2x
x7−2x−3\dfrac{x\sqrt7-2x}{-3}−3x7−2x
x7−2xx\sqrt7-2xx7−2x
x(2−7)−3\dfrac{x(2-\sqrt7)}{-3}−3x(2−7)
Type a concept, like “slope” or “photosynthesis”.