Practice problem
Which of the following rational expressions do not simplify to polynomials?
x2−3xx−2\frac{x^2 - 3x}{x-2}x−2x2−3x when x−2≠0x-2\ne0x−2=0
x2−4x+4x−2\frac{x^2 -4x + 4}{x-2}x−2x2−4x+4 when x−2≠0x-2\ne0x−2=0
x2+4x+4x+4\frac{x^2+4x+4}{x+4}x+4x2+4x+4 when x+4≠0x+4\ne0x+4=0
x4+20x2+100x2+10\frac{x^4+20x^2 + 100}{x^2+10}x2+10x4+20x2+100
Type a concept, like “slope” or “photosynthesis”.