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a=81 and b =1 (a4-b4) = (a²+b²) (a+b) (a-b) ((81)4 – 14)/82×80× (38+1) = ((81)2 +1) (81+1) (81-1) / 82×80× (38+1) = ((34)2+1) ×82×50 /82×80× (38+1) = (38+1)/ (38+1) =1.
If x - 1/x = 9, then the value of x² + 1/ x² is:
What will come in place of the question mark (?) in the following questions?
75% of 240 + 30 = ?
(√ 196 x √ 36 x √ 100) = ?% of 200
654.056 + 28.9015 × 44.851 – 43.129 = ?
1220 ÷ 61 ÷ 5 + 450 of 20% - 70 = √ ?
(√529 + 63 /8)% of 800 = ?% of 250
240 + 25% of 420 – 145 =? + (2.5 + 8.5) 2
