Practice problem
What is (x−x2+42)(x+x2+42)(x-\sqrt{x^2+42})(x+\sqrt{x^2+42})(x−x2+42)(x+x2+42)?
x2−42x^2-42x2−42
x2+42x^2+42x2+42
424242
−42-42−42
Type a concept, like “slope” or “photosynthesis”.
