-x²+9x≥0 (x+10)/(x-25)≤0 49-x²>0x²-9x≤0 x-25≠0 x≠25 (7-x)(7+x)>0x(x-9)≤0 x+10=0 x=-10 x=7 x=-7x=0 x-9=0 + - + - + - x=9 ------(-10)------(25)------- ------(-7)---------(7)--------- + - + x∈[-10;25) -10 x∈(-7;7) -6----(0)-------(9)------x∈[0;9] 0x/(x+4)≤0 x²-3x-10≤0 (32-16x)/(x+8)≥0x=0 x+4≠0 D=49=7² 32-16x=0 x+8≠0 x≠-4 x=-2 x=5 -16x=-32 x≠-8 + - + + - + x=2-----(-4)-----(0)----- -----(-2)------(5)------ - + -x∈(-4;0] -3 x∈[-2;5] -2 --------(-8)----------(2)-------- x∈(-8;2] -7-10; -7; -6; -3: -2; 0