For my Mathematician friends

Did you know?

1 = 2

Start Let X=Y

Multiply by Y XY = YY

Subtract X2 XY – XX = YY – XX

Factorise X(Y – X) = (Y+X)(Y-X)

Divide by (Y-X) X = Y+X

X= X+X

X = 2X

1 = 2 !!!

Can you spot the deliberate mistake?