∫xdx/√(1 - x²)=(1/2)∫2xdx/√(1 - x²)= (1/2)∫dx²/√(1 - x²)= -(1/2)∫d(-x²)/√(1 - x²)= -(1/2)∫d(1-x²)/√(1 - x²)= (-1/2)[1/(1- 1/2)]√(1 - x²)= -√(1 ...