15^(x)-25.3^(x)-9.5^(x)+225>=0

Solve for x:5^(2x)-16.5^(x)-225=0

The maxinum value M of 3^(x)+5^(x)-9^(x)+15^(x)-25^(x) , as x varies over reals, satisfies-

Find the area enclosed by the graph of x^(2)y^(2)-9x^(2)-25y^(2)+225=0

The least value of a for which 5^(1+x)+5^(1-x),a//2,25^(x)+25^(-x) are three consecutive terms of an A.P., is

The least value of a for which 5^(1+x)+5^(1-x),a//2,25^(x)+25^(-x) are three consecutive terms of an A.P., is

The equations of the directrices of the ellipse 25x^(2)+9y^(2)-150x-90y+225=0

In the ellipse 25x^(2)+9y^(2)-150x-90y+225=0

Eccentricity of the ellipse 25 x^(2)+9 y^(2)-150 x-90 y+225=0