(40+17)(40-17)
(44+25)(44-25)
Obliczyć !
zad
(40+17)(40-17)=40²-17²=1600-289=1311
(44+25)(44-25)=44²-25²=1936-625=1311
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zad
(40+17)(40-17)=40²-17²=1600-289=1311
(44+25)(44-25)=44²-25²=1936-625=1311