An article is sold for a Rs 657.90 after successive

If 2x + (1/9x) = 5, then find the value of 81x² + (1/4x²) - (1785/4)

‘a’ is directly proportional to ‘b’. If at a=30, the value of ‘b’ is 20% greater than ‘a’, then find the value of ‘a’ when b=54.

(288 ÷ 8)² × (144 ÷ 24)³ = 24 × ? × (51840 ÷ 20)

((99.9 - 20.9)² + (99.9 + 20.9)² )/(99.9 x 99.9 + 20.9 x 20.9) = ?

If a = 32, b = c = 31, then find the value of a ³  + b ³  + c ³  – 3abc.

If a = 2 + √3, then the value of (a⁶ + a⁴ + a² + 1)/a³ is

Calculate the value of the expression: {2 X (P³ - Q³) - 30 X P X Q} if (P - Q) = 6 and (P² + Q²) = 80

when x =4 and y =-6 then find the value of 27x³ +58x²y +31xy² +8y³?