формула
a²-b²=(a-b)(a+b)
3,7²-6,3²=(3,7-6,3)·(3,7+6,3)=-2,6·10
13²-12,6²=(13-12,6)·(13+12,6)=0,4·25,6
4,2²-5,8²=(4,2-5,8)·(4,2+5,8)=-1,6·10
2,3²-0,3²=(2,3-0,3)·(2,3+0,3)=2·2,6
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Verified answer
формула
a²-b²=(a-b)(a+b)
3,7²-6,3²=(3,7-6,3)·(3,7+6,3)=-2,6·10
13²-12,6²=(13-12,6)·(13+12,6)=0,4·25,6
4,2²-5,8²=(4,2-5,8)·(4,2+5,8)=-1,6·10
2,3²-0,3²=(2,3-0,3)·(2,3+0,3)=2·2,6