25-4y^(2)+21y

Factorise: y ^(2) - 21y + 90

Factories: 4y ^(2) + 20y + 25

Fractorise: (3x-4y)^(2) - 25z ^(2)

I. 4x^(2) = 25" " II. 2y^(2) - 13y + 21 = 0

The pair of lines 2x^(2)+3xy+5y^(2)=0 and 4x^(2)+21xy+25y^(2)=0 are

Factorize each of the following algebraic expressions: a^(2)+14a+48(2)x^(2)-4x-21y^(2)+5y-36(4)(a^(2)-5a)^(2)-36(a+7)(a-10)+16

The line x+14y=25 is the polar of the ellipse x^(2)+4y^(2)=25. Find coordinates of the pole.

The foci of the ellipse 25 x ^(2) + 4y ^(2) + 100x -4y + 100 =0 are

The foci of the ellipse 25 x ^(2) + 4y ^(2) + 100x -4y + 100 =0 are