755.

б) 36-a²b²= (6-ab)(6+ab)

г)16/25-k²p²= (4/5-kp)(4/5+kp)

е)9m²n²-0,01p²=(3mn-0,1p)(3mn+0,1p)

з)1/9a²b²-2 7/9m²p²=(1/3ab-5/3mp)(1/3ab+5/3mp)

756.

б)13,6²-3,6²=(13,6-3,6)(13,6+3,6)= 10*17,2=172

г)5,8²-94,2²=(5,8-94,2)(5,8+94,2)= -88,4*100=-8840

е)(3 5/8)²-(1 3/8)²=(29/8-11/8)(29/8+11/8)=18/8*40/8=720/64=90/8=45/4=11 1/4

757.

а)(24-12)(24+12)/(18-6)(18+6)= 432/288=1,5

б)(32-17)32+17)/(70+35)(70-35)= 735/3675=0,2

в) 7,4-2,6)(7,4+2,6)/(11,2-8,8)(11,2+8,8)= 48/48=1