" 12.Determine "(8x)^(x)," if "9^(x+2)=240+9^(x)

The domain of the function (x^(2) + 8x + 9)/(x^(2) - 9x + 20) is

The domain of the function (x^(2) + 8x + 9)/(x^(2) - 9x + 20) is

Irrational roots of the equaiton 2x^(4) + 9x^(3) + 8x^(2) + 9x + 2 = 0 are

x^4-8x^2-9=0

If x=9 is the chord of contact of the hyperbola x^(2)-y^(2)=9 then the equation of the corresponding pair of tangents is (A)9x^(2)-8y^(2)+18x-9=0(B)9x^(2)-8y^(2)-18x+9=0(C)9x^(2)-8y^(2)-18x-9=0(D)9x^(^^)2-8y^(^^)2+18x+9=0'

The value of the determinant |(x+2,x+3,x+5),(x+4,x+6,x+9),(x+8,x+11,x+15)| is