The difference will be

.
Remember that parentheses are needed for the second polynomial because the negative is distributed to all of its terms.
Answer:
the third one
Step-by-step explanation:
9 to the power of 4 is 9 multiplied by it's self 4 times
Answer:
he needs to know the width!!!
Step-by-step explanation:
since length multiplied by the width equals area,
so since the length is given, the width is needed
there is no visible graph
Step-by-step explanation: