Find 1) 198*198-102*102÷96
2) (8.63)square - (1.37)square
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2. 8.63*8.63=74.4769
1.37*1.37=1.8769
then,
74.4769-1.8769
=72.6
1.37*1.37=1.8769
then,
74.4769-1.8769
=72.6
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