Solve using formula of (a+B²)--> (75)²
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Answer:
7500
(a+b)²=a²+b²+2ab
(a-b)²=a²+b²-2ab
(a+b)²-(a-b) ²=a²+b²+2ab-(a²+b²-2ab)
a²+b²+2ab-a²-b²+2ab = 4ab
75²-25²
= 4*75*25
= 7500
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