Question

If a + b = 5 and a - b = V17 then the value of ab should be​

Answer 1

Step-by-step explanation:

$a + b = 5 \: and \: a - b = 17$

adding both the equations,

$2a = 22$

$a = 11$

Therefore,

$b = 5 - 11 = - 6$

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