88²=7.744
69²=4.761
54²=2.916
7.744+4.716-2.916=9.589
25×35=875
875+89=964
===================
= 25 × 35 + 89
= 875 + 89
= 964
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88²=7.744
69²=4.761
54²=2.916
7.744+4.716-2.916=9.589
25×35=875
875+89=964
Penyelesaian :
===================
= 25 × 35 + 89
= 875 + 89
= 964