Which of the following is not the

If 4x² + y² = 40 and x y = 6, then find the value

of 2x + y?

Calculate the difference between (7.225) ² - (2.275) ²     

If a + (1/a) = 2, then find the value of (a⁵ + a³ + 6)/(7a – 5). 

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

If ab + bc + ca = 0

Find the value of 1/(a² - bc) + 1/(b² - ca) + 1/(c² - ab)

ABCD is a cyclic quadrilateral in which AB =16.5 cm. BC = x cm. CD= 11 cm. AD 19.8 cm, and BD is bisected by AC at O. What is the value of x?

If a = 55, then what is the value of

If x⁴ + x³ + x² + x + 1 = 0, then find the value of x¹⁵²⁵ + x⁷²⁰ + 14 + x³²⁰ =?