Question
Download Solution PDFIf a + b = 5 and a - b = \(\sqrt{17}\), then ab = ________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
a + b = 5
a - b = √17
Formula used:
(a + b)2 - (a - b)2 = 4ab
Calculation:
(5)2 - (√17)2 = 4ab
⇒ 25 - 17 = 4ab
⇒ 8 = 4ab
⇒ ab = 2
∴ The correct answer is option (1).
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