Question

We know that a2 = | a |. What is the value of (-5)2 ?​

Answer 1

Step-by-step explanation:

Given that, a−b=5 and a

2

+b

2

=53

We know that (a−b)

2

=a

2

+b

2

−2ab

⟹(5)

2

=53−2ab

⟹25=53−2ab

⟹2ab=53−25

⟹2ab=28

⟹ab=

2

28

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∴ab=14 (Ans)

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