(x+в)8 ; (a+в)9
(х+b)^8=x^8+8x^7*b+28x^6*b^2+56x^5*b^3+ +70x^4*b^4+56x^3*b^5+28x^2*b^6+8x*b^7+b^8 (a+b)^9= =a^9+9a^8*b+36a^7*b^2+84x^6*b^3+126x^5*b^4+ +126a^4*b^5+84a^3*b^6+36a^2*b^7+9a*b^8+b^9