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Mathematics, 17.07.2019 23:20 jhanezd
Which shows 42^2 โ 28^2 being evaluated using the difference of perfect squares method?
422 โ 382 = (1,764 โ 1,444)(1,764 + 1,444) = 1,283,200
422 โ 382 = 1,764 โ 1,444 = 400
422 โ 382 = (42 โ 38)2 = (4)2 = 16
422 โ 382 = (42 + 38)(42 โ 38) = (70)(4) = 280
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Which shows 42^2 โ 28^2 being evaluated using the difference of perfect squares method?
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