1. 22² +2*22*38+38²=(22+38)²=60²=3600
2. 103² - 2*103*3 + 3²=(103-3)²=100²=10000
3. 39²-19²=(39-19)(39+19)=20*58=1160
4. 63,5² -13,5²=(63,5-13,5)(63,5+13,5)=50*77=3850
1. 22² +2*22*38+38²=(22+38)²=60²=3600
2. 103² - 2*103*3 + 3²=(103-3)²=100²=10000
3. 39²-19²=(39-19)(39+19)=20*58=1160
4. 63,5² -13,5²=(63,5-13,5)(63,5+13,5)=50*77=3850