Ответ
(2x-1)(x-2)+(3x+2)(x+3)-8 (x+3)(x-2)=0
2x^2-4x-x+2+3^2+9x+2x+6-8x^2+16x-24x+48=0
-3x^2-2x+56=0
3x^2+2x-56=0
D=4+672=26^2
x1=(-2-26):6= -4,67
x2=(-2+26)÷6=4
46²-92*31+31²=(46-31)²=15²=225
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3)x²-6x<0
x(x-6)<0
x=0 x=6
+ _ +
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0 6
x∈(0;6)
1)y=9x^2-3x+5 y'=18x-3
2)y=-2x^3+7x-1 y'=-6x^2+7
3)y=1/3x^12-2/7x-п y'=4x^11-2/7
4х+2=18х
4х-18х= -2
х= 2/14
х= 1/7