Practice problem
Which of the following quadratics can be factored?
x2+8x+6x^2+8x+6x2+8x+6
x2+12x+10x^2+12x+10x2+12x+10
x2+4x+2x^2+4x+2x2+4x+2
x2+6x+4x^2+6x+4x2+6x+4
x2+2xx^2+2xx2+2x
Type a concept, like “slope” or “photosynthesis”.