" 21."2(ax-by)+(a+4b)=0;2(bx+ay)+(b-4a)=0

Solve the following pair of linear equations 2(ax-by)+(a+4b)=02(bx+ay)+(b-40=0

A circle with center (a,b) passes through the origin.The equation of the tangent to the circle at the origin is ax-by=0 (b) ax+by=0bx-ay=0 (d) bx+ay=0

The straight line x-y-2=0 cuts the axis of x at A. It is rotated about A in such a manner that it is perpendicular to ax+by+c=0. Its equation is: (a) bx-ay-2b=0 (b) ax-by-2a=0 (c) bx+ay-2b=0 (d) ax+by+2a=0

ax+by=a+b bx+ay=b^2

ax+by=a-b;bx-ay=a+b

If a!=b, then the system of equations ax+by+bz=0,bx+ay+bz=0,bx+by+az=0 will have a non-trivial solution if (1)a+b=0 (2) a+2b=0 (3) 2a+b=0(4)a+4b=0

(bx)/(a)-(ay)/(b)+a+b=0 and bx-ay+2ab

The equation of a line perpendicular to line ax+by+c=0 and passing through (a,b) is equal to ................ A) bx-ay=0 B) bx+ay-2ab=0 C) bx+ay=0 D) bx-ay+ 2ab=0

Equation of the circle through origin which cuts intercepts of length a and b on axes is a.x^(2)+y^(2)=ax+by=0 b.x^(2)+y^(2)-ax-by=0cx^(2)+y^(2)+bx+ay=0 d.none of these

The image of the pair of lines represented by ax^(2)+2hxy+by^(2)=0 by the line mirror y=0 is ax^(2)-2hxy-by^(2)=0bx^(2)-2hxy+ay^(2)=0bx^(2)+2hxy+ay^(2)=0ax^(2)-2hxy+by^(2)=0