Question

Find the value of 195×195-2×195×5+5×5 by using the identities.​

Answer 1

Answer:

(195×195) - 2 × (195) × (5) + (5×5)

(195)² - 2×195×5 + (5)²

using identity a²-2ab+b² = (a-b)²

(195-5)²

(190)²

i.e 36100

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