Answer:
4) you can check by plugging in the numbers.
Step-by-step explanation:
For the first one it is x= (y+3)/4
Yes, good job! :)
16b4=9
(4b²+3) (4b²-3)
16b4-12b²+12b²-9
16b(raised to power 4)-9
16b4-9
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