x+y=5quad ;quad xx-y=3

If x = 5/4 and y=(-1)/3 , then find the value of (x + y) xx (x-y) .

The equations of the lines through the point of intersection of the lines xxx-y+1=0xx and xx2x-3y+5=0xx whose distance from the point xx(3, 2)xx is xx7/5xx, is (A) xx3x-4y=0 and 4x+3y +1=0xx (B) xx3x-4y+6=0 and 4x-3y-1=0xx (C) xx3x -4y+6 =0 and 4x -3y+1 = 0xx (D) None of these

If 2^(x) = 4 xx 2^(y) and 9 xx 3^(x) = 3^(-y) , find the values of x and y.

If X= {x:x in N and (x-3)(x-2)=0} Y= {x:x in N and x lt 5} "then find X" cup Y.

If X= {x:x in N and (x-3)(x-2)=0} Y= {x:x in N and x lt 5} "then find X" cup Y.

Solve the following system of equations by matrix method : 5x+7y+2=0 4x+6y+3=0 5x+2y=3 3x+2y=5 3x+4y-5=0 x-y+3=0 3x+y=19 3x-y=23 3x+7y=4 x+2y=-1 3x+y=7 5x+3y=12

5x xx (- 3y) =

Verify that |x xx y| = |x| xx |y| by taking x=(-3)/(5), y=(-5)/(3) .

If x=-3/5 and y=-4/7 then show that |x xx y|=|x| |y|