Find the value of:
(i) a² + b² when a + b = 9, ab = 20
(ii) p² + q² if p - q = 6 and p + q = 14
(iii) x² +¹/x² and x⁴ +¹/x⁴ if x + ¹/x= 3
(iv) x - ¹/x , and x² - 1/x² if x + ¹/x =√5
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Answer:(i)41 (ii)116 (iii)7,47 (iv) √5, 3
Step-by-step explanation:
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