Question

Can someone solve 15 sum 1st bit ... with a explanation plz ....

Answer 1

heya....

You mean to solve all those are given...?

Answer 2

Given,

ax + by = a - b .......1

bx - ay = a + b .......2

Multiply by a in equation 1 and b in equation 2, we get

a2 x + aby = a2 - ab .......3

b2 x - aby = ab + b2 .......4

Add equation 3 and 4, we get

a2 x + aby + b2 x - aby = a2 - ab + ab + b2

=> a2 x + b2 x = a2 + b2

=> x(a2 + b2 ) = a2 + b2

=> x = (a2 + b2 )/(a2 + b2 )

=> x = 1

Put value of x in equation 1, we get

=> a + by = a - b

=> by = a - b - a

=> by = -b

=> y = -b/b

=> y = -1

So, x = 1, y = -1