" 8."-x+[5y-{x-(5y-2x)}

Simplify each of the following: 2x-{5y-(x-2y)} 2x-[3y-{2x-(y-x)}]

Simplify each of the following: 2x-{5y-(x-2y)} 2x-[3y-{2x-(y-x)}]

2x+3y=8 4x-5y=-6

Evaluate : 3x^(2) + 5xy - 4y^(2) + x^(2) - 8xy - 5y^(2)

Fill in the blanks : (2x+5y)(2x+5y)=(2x)^2+(......)xx2x+(5y)^2

Simplify the following:(x-2y) (y-3x)+(x+y) (x-3y)- (y-3x)(4x-5y).

If the circumference of the circle x^2+y^2+8x+8y-b=0 is bisected by the circle x^2+y^2=4 and the line 2x+y=1 and having minimum possible radius is 5x^2+5y^2+18 x+6y-5=0 5x^2+5y^2+9x+8y-15=0 5x^2+5y^2+4x+9y-5=0 5x^2+5y^2-4x-2y-18=0

The centre of ellipse 5x^(2)+5y^(2)-2xy+8x+8y+2=0 is