2 answers:
Let's see
#a
Take 28
- (28)²
- (30-2)²
- 30²-2(30)(2)+2²
- 900-120+4
- 780+4
- 784
#2
Take 9,10
- 9³+10³
- (9+10)(9²-9×10+10²)
- (19)(81-90+100)
- 19(181-90)
- 19(91)
- 1729
Answer:
Two-digit number greater than 25: 32
Rewrite 32 as the difference of 2 numbers: 40 - 8
Therefore, x = 40 and y = 8

Let a = 10
Let b = 11

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-35 ok that is the answer