Question

Using identity find the value of 194*206.

Answer 1

194*206

Step-by-step explanation:

$(200 - 6)(200 + 6) \\ (x + y)(x - y) = x { }2 - y2 \\ 200 { }^{2} - 6 { }^{2} = 40000 - 36 \\ = 39974$

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