Question

using the suitable identity find the value of ( 3. 7)^2 - (1.3)^2​

Answer 1

Answer:

${3.7}^{2} - {1.3}^{2} \\ using \: identity( {a}^{2} - {b}^{2} ) \\ = (a + b)(a - b) \\ (3.7 + 1.3)(3.7 - 1.3) \\ = 5 \times 2.4 = 12$

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Answer 2

Answer:

(3.7+1.3) (3.7-1.3)

5×2.4

12

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