Question

using an identity evaluate the following 100²-5²
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Answer 1

Answer:

Step-by-step explanation:

(100+5)(100-5)

105*95

9975

Answer 2

Answer:

9975

Step-by-step explanation:

∵ $a^{2}$-$b^{2}$ = [a+b][a-b]

∴ [100+5][100-5] ⇒ 105×95=9975