Question

найдите значение дроби:

 

a) 24^2-12^2 /18^2-6^2

б)32^2-17^2/70^2-35^2

в)7,4^2-2,6^2/11,2^2-8,8^2

Answer 1

a) (24²-12²)/(18²-6²)=12²(2²-1)/6²(3²-1)=2²*3/8=3/2=1,5

б) (32-17)(32+17)/(70-35)(70+35)=15*49/35*105=7/35=1/5=0.2

в) (7.4-2.6)(7.4+2.6)/(11.2-8.8)(11.2+8.8)=4.8*10/2.4*20=48/48=1