Answer:
1. x²-1
2. x²-16
Step-by-step explanation:
1. (x + 1)(x - 1)
=x²- 1x + 1x - 1
=x²-1
2. (x + 4)(x - 4)
=x²- 4x + 4x - 16
=x²- 16
Hope it helps! Thank you! Good Evening!
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Answers & Comments
Answer:
1. x²-1
2. x²-16
Step-by-step explanation:
1. (x + 1)(x - 1)
=x²- 1x + 1x - 1
=x²-1
2. (x + 4)(x - 4)
=x²- 4x + 4x - 16
=x²- 16
Hope it helps! Thank you! Good Evening!
2. (x + 7) (x - 7) =
3.
2. (x + 7) (x - 7) = x² - 49
3. (x + 9) (x - 9) = x² - 81