Question

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If a^2+b^2 = 58 and a-b = 4 then what is the value of ab
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Answer 1

ab = 21

Explanation:

`(a - b)^2 = (a^2 + b^2 ) - 2ab\\\\4^2 = 58 - 2ab\\\\16 - 58 = - 2ab\\\\- 42 = - 2ab\\\\ab = (-42)/(-2) = 21`

Answer 2

Explanation:

Th value of ab is 21

Explanation is in the attachment

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