98 = 100 - 2
(100 - 2)(100 - 2)
Using FOIL:
100^2 - 100(2) - 100(2) + -2^2
10000 - 400 + 4
9604
(100 - 2)(100 - 2)
Using FOIL:
100^2 - 100(2) - 100(2) + -2^2
10000 - 400 + 4
9604
98^2 no calculator FOIL
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