Practice problem
Find an equation of a line tangent to the curve x2+4xy−2y2+x=6x^2+4xy-2y^2+x=6x2+4xy−2y2+x=6 at the point (2,4)(2,4)(2,4).
y=218x−34y=\frac{21}8x-\frac34y=821x−43
y=218x−1y=\frac{21}8x-1y=821x−1
y=218x−54y=\frac{21}8x-\frac54y=821x−45
y=218x−32y=\frac{21}8x-\frac32y=821x−23
Type a concept, like “slope” or “photosynthesis”.