cho cac bieu thuc: P=(a+1)^2+(b+1)^2+2(ab+ac+bc) Q=(a+b+c+1)^2. tinh P-Q

Cho cac bieu thuc : 

P = ( a + 1 )² + ( b + 1 )² + ( c + 1 )² + 2 ( ab + ac + bc ) 

Q = ( a + b + c + 1 )²

Tinh P - Q

1) Cho bieu thuc A=\(3+\frac{2}{x-1}\). Tinh gia tri cua bieu thuc A khi |2x-3|=1  

2) Rut gon bieu thuc B=\(\frac{x}{x-1}\)-\(\frac{x-5}{x+1}\)-\(\frac{3-x}{1-x^2}\)

3) Tim cac gia tri nguyen cua x de bieu thuc \(\frac{B}{A}\)co gia tri nguyen duong

cho a,b,c khac nhau doi mot va 1/a+1/b+1/c=0.rut gon cac bieu thuc

N=bc/a^2+2bc+CA/B^2+2AC+AB/C^2+2AB

cho 1/a+1/b+1/c=0.tinh gia tri bieu thuc P=ab/c²+bc/a²+ca/b²