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Hope this helps
Date Posted:
1 year ago
Hi, thank you. May I check if I can let y+100=a and y-100=b
Then (y+100)² - (y-100)²
(using a²-b²=a-b, a+b)
If so, how do I continue from (y+100)² - (y-100)²
Then (y+100)² - (y-100)²
(using a²-b²=a-b, a+b)
If so, how do I continue from (y+100)² - (y-100)²
Very good thinking! Refer to the other photo!
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Alternative solution (Your idea)
Date Posted:
1 year ago
Thank you so much