[" (i) "(2a-1)x+3y-5=0],[quad 3x+(b-1)y-2=0],[" (ii) "2x+3y=7],[quad (a-b)x+(a+b)y=3a+b-2quad [NCERTE]

2x + 3y = 7& (a-b)x+ (a + b) y = 3a + b-2

{:((2a - 1)x + 3y - 5 = 0),(3x + (b - 1) y - 2 = 0):}

If O Aa n dO B are equal perpendicular chords of the circles x^2+y^2-2x+4y=0 , then the equations of O Aa n dO B are, where O is the origin. (a) 3x+y=0 and 3x-y=0 (b) 3x+y=0 and 3y-x=0 (c) x+3y=0 and y-3x=0 (d) x+y=0 and x-y=0

2x + 3y = 7 , (a+b + 1 )x + (a + 2b + 2) y = 4 (a + b ) + 1

Multiply: (i) (2x^2-1)b y\ (4x^3+5x^2) (ii) (2x y+3y^2)(3y^2-2)

Two straight lines u=0a n dv=0 pass through the origin and the angle between them is tan^(-1)(7/9) . If the ratio of the slope of v=0 and u=0 is 9/2 , then their equations are (a) y+3x=0 and 3y+2x=0 (b) 2y+3x=0 and 3y+x=0 (c) 2y=3x and 3y=x (d) y=3x and 3y=2x

2x+3y=7(a+b)x+y(2a-b)=3(a+b+1) find the value of a+b

If A=[(-3,2),(2,-4)],B=[(1,x),(y,0)] and (A+B),(A-B)=A Find x and y