Question

find anwer of this question no. 13
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Answer 1

Answer:

1620

Step-by-step explanation:

${54}^{2} - {36}^{2} \\ 2916 - 1296 \\ 1620$

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Answer 2

54²-36². [a²-b²=(a+b)(a-b)]

= (54+36)(54-36)

= 90×18

= 1620

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