Practice problem
Which of the following are able to be factored?
x2−3x+2x^2-3x+2x2−3x+2
x2−4x+3x^2-4x+3x2−4x+3
x2−3x+4x^2-3x+4x2−3x+4
x2−5x+4x^2-5x+4x2−5x+4
x2−5x+6x^2-5x+6x2−5x+6
x2−6x+7x^2-6x+7x2−6x+7
Type a concept, like “slope” or “photosynthesis”.