It is for if you die, or get seriously injured then it simply says that it is not the places fault but it is your own. Places usually do it to avoid being sued.
(2x-3)(x+7)=
2x^2 + 14x - 3x - 21=
2x^2+11x-21.
I'm trying to decide between A and C, but I believe it is C.
Answer:
You can change it in the editing or ask the teacher if the can let you back to revising
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