N°771(3)
(f-2)²-3f(3f-2)+(2+3f)(3f-2)
f²-4f+4-9f²+6f+9f²-4
f²+2f
(-0,5)²+2(-0,5)
1)(-0,5)²=-0,5(-0,5)=0,25
2)2(-0,5)=-1
3)0,25+(-1)=25/100-100/100=-75/100=-0,75
Ответ:-0,75
N°772(3)
2(1+4t)²-(t-1)(2+2t)+10t
2(1+8t+16t²)-(2t+2t²-2-2t)+10t
2+16t+32t²-2t-2t²+2+2t+10t
4+26t+30t²
30t²+26t+4