Question

using suitable identity find the valur of 55 cube+ 45 cube by 55 cube - 45 x 55 + 45 cube

Answer 1

Answer:

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Answer 2

Answer:

55 × 45 = (50 + 5) (50 – 5) Identity (a + b)(a – b) = a2 – b2 Here a = 50,b=5 (50 + 5)(50 – 5) = (50)2 – 52 = 2500 – 25 55 × 45 = 2475