a)(p+1)²-(p+2)²=р²+2р+1-р²-2р-4= -3
Б)2(2ab-b²)+2(a-b)²=4ab-2b²+2(a²-2ab+b²)= 4ab-2b²+2a²-2ab+2b²=2ab+2a²
в)(7-х)(7+х)+(х+3)²=49-х²+х²+6х+9=40+6х
a)(p+1)²-(p+2)²=р²+2р+1-р²-2р-4= -3
Б)2(2ab-b²)+2(a-b)²=4ab-2b²+2(a²-2ab+b²)= 4ab-2b²+2a²-2ab+2b²=2ab+2a²
в)(7-х)(7+х)+(х+3)²=49-х²+х²+6х+9=40+6х