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If a + b + c = 6, a² + b² + c² = 14 and ab + bc+ ca = 11, then what is the value of a³ + b³ +c³ –3abc?
11, 18, 27, 38, 54, 66
3x +3y =10 and 3x+y =5 then find the value of 3x-y +3y-x.
(408 × 680)÷(20% of 680) = (250 × 260)÷ 10 + ? – 4500
If x = 19 , find x 5 - 20 x 4 + 20 x 3 - 20x 2 + 20x - 20 = ?
What is the average of the first 20 multiples of 12?
If x = 6 + 2√5, then the value of √x - (1/√x)?
If x2 – 10x + 20 = 0, then find the value of (x – 3)2 + 1/(x – 3)2
If (r + s + t) = 12 and (rs + st + tr) = 60, then find the value of (r² + s² + t²).
