Question

97*103,Find the value using expansion formula.

Answer 1

BONJOUR,
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$(100 - 3)(100 + 3) \\ by \: using \: identity \: (x - y)(x + y) = x {}^{2} . - y {}^{2} \\ \\ 100 {}^{2} - 3 {}^{2} \\ 10000 - 9 \\ = 9998$