Question

(Q.11) Simplify: (3/5 - 213)(3/5 +213)
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Answer 1

(3/5 - 213)(3/5 + 213) = (3/5)² - 213²   (since (a+b)(a-b) = a² - b²)

                                  = 9/25 - 45369

                                  = 9 - 1134225 / 25

                                  = - 1134216/25

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