Ответ:
-8
Пошаговое объяснение:
= 24с² - 8с + 36с - 12 - 15с² - 18с - 10с - 12 = 9с² - 24
при с = 1 1/3
9*(1 1/3)² - 24 = 9 * 16/9 - 24 = 16 - 24 = -8
5/8 * (-4/10) = 5/8 * (-2/5) = -1/4
3/5 : -21/20 =-( 3*20/5*21 )= -20/5*7 = -4/7
-1/4 - 4/7 = (-1*7 - 4*4) /28 = -23/28
1) 18/35*45=18/7*9=162/7=23 1/7
2) 9/16:27=9/16*1/27 = 1/16*1/3=1/48
3) 6/57*19/12=1/3*1/2=1/6
4) 8/15:2/3=8/15*3/2=4/5
5)36:4/9=36*9/4=9*9=81