Practice problem
Does ∣x∣=x|x| = x∣x∣=x?
Yes, always
No, always
Yes, when x>0x > 0x>0 or x=0x=0x=0
Yes, when x<0x < 0x<0 or x=0x=0x=0
Type a concept, like “slope” or “photosynthesis”.
