" 47."7(x-2y)^(2)-25(x-2y)+12quad " 48."4x^(4)+7x^(2)-2

Factorize : 7(x-2y)^2 - 25 (x-2y)+12

Find each of the following products: (i) (4x - 7y) (4x - 7y) (ii) (3x^(2) - 4y^(2)) (3x^(2) - 4y^(2))

If x=2 and y=3, then find the values of (i) (2x+3y)/(4x-3y) " "(ii) (2x^(2)-7x+2y)/(2y^(2)-7y+2x)

The external centre of similitude of the circle x^(2)+y^(2)-12x+7y+48=0 and x^(2)+y^(2)-4x+2y-4=0 divides the segment joining centres in the ratio.

The circles x^(2)+y^(2)-12x+8y+48=0, x^(2)+y^(2)-4x+2y-4=0 are

The circles x^(2)+y^(2)-12x+8y+48=0, x^(2)+y^(2)-4x+2y-4=0 are

x^(2)-3x^(2)y-4x+7 if x=-2,y=2

Simplify : 7x^(3)+8y^(3)-(4x+3y)(16x^(2)-12xy+9y^(2))

List of the like terms in the following expression. (i) 4x^(4),-7x^(3),8x^(2),12x^(3),-9x^(4),-5x,4x^(3),12x^(2) (ii) 5xy,-3x^(2)y,2xy^(3),-2x^(2)y^(2),5x^(2)y,-3xy,6x^(2)y^(2)