Please solve from (x) to (xvii)
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(x) 98.2×100.8
= (100+2)(100-2)
= (100)²- (2)²
= 10000-4
= 9,996
(xvii) 225×225-(175)²
= (225)²-(175)²
= (225+175)(225-175)
= 400×50
= 20000
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