Find :`984^2` - `16^2`

Find : 24^(2) - 16^(2)

Find the foci of the hyperbola 9x^(2) - 16y^(2) + 72 x - 32 y - 16 = 0

Factorise : 25x^2 + 16y^2 + 42^2 - 40xy + 16yz -20xz .

Find the errors and correct the following mathematical sentences : (x-4)^2 = x^2-16 .

Factorise : 9a^2 + 4b^2+ 16c^2+12ab16bc -24ca .

Find the length of focal radii drawn from the point (4 sqrt(3),5) on the ellipse 25x^(2) + 16y^(2) = 1600

Evaluate intsqrt(25 + 16x^(2))dx

Find the corrdinates of the foci and the vertices, the eccentricity, the length of the latus rectum of the hyperbolas : (i) (x^(2))/(9)-(y^(2))/(16)=1 (ii) y^(2)-16x^(2)=16

Find the normals at the ends of the latus-rectum (in first quadrant) of the ellipse 9x^(2)+16y^(2)=144