(q/(q - 5) - 2q) : (11 - 2q)/(q - 5) = (q - 2q(q - 5))/(q - 5) * (q - 5)/(11 - 2q) = (q - 2q^2 + 10q)/(11 - q) = (11q - 2q^2)/(11 - 2q) = q(11 - 2q)/(11 - 2q) = q
А) х⁶-10х⁴+11х³-х+14
х=-2;
(-2)⁶-10·(-2)⁴+11·(-2)³-(-2)+14=64-160-88+2+14=-168
б)а³-14а³-6аб²+б+2=-13а³-6аб²+б+2
а=-1;б=0,5;
-13·(-1)³-6·(-1)·(0,5)²+0,5+2=13+1,5+2,5=17