1)8x²+2px-3p²;2x²+3px-3p²;
сумма:(8x²+2px-3p²)+(2x²+3px-3p²)=8x²+2px-3p²+2x²+3px-3p²=10x²+5px-6p²;
разность:(8x²+2px-3p²)-(2x²+3px-3p²)=8x²+2px-3p²-2x²-3px+3p²=6x²-px=x(6x-p);
2)(3a+5b)-(9a-7b)+(-5a+11b)=3a+5b-9a+7b-5a+11b=-11a+23b;
(3x²+2x)+(2x²-3x-4)-(-x²+19)=3x²+2x+2x²-3x-4+x²-19=6x²-x-23;
(х-1 5/7) + 22 4/7=26
х- 1 5/7 + 22 4/7=26
х= 26+1 5/7 - 22 4/7
х= -5 2/7
(-4а+2а-2b+3a+3b /a²-b² )*a-b/2 = a+b/(a-b)(a+b) * (a-b)/2 = (a+b)/(a+b) *1/2= 1/2=0,5