Question

105 X 102
Evaluate by using the identities.

Answer 1

BONJOUR,
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$105 \times 102 \\we \: can \: write \: like \: \\ (100 + 5)(100 +2) \\ (a - b)(a + b) = a {}^{2} - b {}^{2} \\ then \\ (100 + 5)(100 - 5) \\ 100 {}^{2} - {2}^{2} \\ 10000 - 4 \\ 9996 \\ hope \: it \: hepls$

Answer 2

is The answer............