1). 72/(13^2-11^2)2). (79^2-65^2)/4203). (92^2-48^2)/(27^2-17^2)4)....

Question

1). 72/(13^2-11^2)
2). (79^2-65^2)/420
3). (92^2-48^2)/(27^2-17^2)
4). (63^2-27^2)/(83^2-79^2)
Пожалуйста решите!!!

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Answer 1

1) 72/ (13-11)(13+11)= 72/(2)(24)=72/48=1.5
2) (79-65)(79+65)/420=(14)( 144)/420=144/30=4.8
3) (92-48)(92+48 )/ (27+17)(27-17)= (44*140)/(44*10)=14
4)(63-27)(63+27)/ (83-79)(83+79)=(36*90)/(4*162)=5