Ответ:
1)55²-45²=(55-45)(55+45)=10×100=1000
2) 64²-36²=(64-36)(64+36)=28×100=2800
3) 3⅔²-2⅓²=(3⅔-2⅓)(3⅔+2⅓)= 4/3×6=8
4) 68/9²-40/9²=(68/9-40/9)(68/9+40/9)=28/9×108/9=3024/9=336
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Ответ:
1)55²-45²=(55-45)(55+45)=10×100=1000
2) 64²-36²=(64-36)(64+36)=28×100=2800
3) 3⅔²-2⅓²=(3⅔-2⅓)(3⅔+2⅓)= 4/3×6=8
4) 68/9²-40/9²=(68/9-40/9)(68/9+40/9)=28/9×108/9=3024/9=336