` (bx ) /(a) + ( ay ) /( b) = a ^(2) + b ^(2)`,
` x + y = 2ab `

Solve: (a - b )x + (a + b)y = a^(2) - 2ab - b^(2) and (a + b) (x + y) = a^(2) + b^(2)

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

If x ^(2) + y ^(2) + z ^(2)ne 0, x= cy + bz, y= az +cx, and z= bx + ay, a ^(2) + b ^(2) + c ^(2) + 2 abc is equal to

If y= e^(ax) sin(bx), show that y2 - 2ay1 + ( a^2 + b^2 ) y = 0

If ax + by = a^(2)-b^(2) and bx + ay = 0, find the value of x + y .

If (x+1)/(x-1)=(a)/(b) and (1-y)/(1+y)=(b)/(a), then the value of (x-y)/(1+xy) is (2ab)/(a^(2)-b^(2)) (b) (a^(2)-b^(2))/(2ab) (c) (a^(2)+b^(2))/(2ab) (d) (a^(2)-b^(2)backslash)/(ab)