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22-06-2021
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If a = 3 and ab =15, then (a+b)^2-a^2-b^2=

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rakhip259 rakhip259

22-06-2021

Answer: Is b=15 not ab=15

Explanation:

(a+b) ^2-a^2-b^2=(3+15)^2-3^2-15^2

=(18)^2-9-225

= 324-9-225

=90

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