`x^2 +y^2= 9 & 4a^2 + 9b^2= 16`, then maximum value of `4a^2 x^2+ 9b^2y^2- 12abxy` is -

If x^2+y^2=4 then find the maximum value of (x^3+y^3)/(x+y)

If x is real , the maximum value of (3x^2+9x+17)/(3x^2+9x+7)"i s"

If 5(tan^2x - cos^2x)=2cos 2x + 9 , then the value of cos4x is

If x is a real number then maximum value of (3x^(2)+9x+17)/(3x^(2)+9x+7) is …………

Factorise : 4x^(2) + 9y^(2) + z^(2) + 12xy - 6yz - 4zx

Factorise : 4x^(2) + 9y^(2) + 16z^(2) +12xy - 24yz - 16xz

If parabolas y^2=lambdax and 25[(x-3)^2+(y+2)^2]=(3x-4y-2)^2 are equal, then the value of lambda is 9 (b) 3 (c) 7 (d) 6

Factories (i) 25 x ^(2) + 16 y ^(2) + 4z ^(2) - 40 xy + 16 xy - 20xy (ii) 9a ^(2) + 4b ^(2) + 16 c ^(2) + 12 ab - 16 bc - 24 ca

The area of region bounded by the curve x^2 +y^2 =9 parabola y^2 = 8x is ……

Eccentricity of ellipe 9x^(2) + 25y^(2) = 225 is …….