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Log5(3-2x)<2
ОДЗ: 3-2x>0; -2x>-3; 2x<3; x<1,5
log5(3-2x)<log5(25)
3-2x<25
-2x<25-3
-2x<22
2x>-22
x>-11
С учетом ОДЗ: x e (-11; 1,5)
X²+3/5x=10-1/2x-3x²+8/14x
4x²+(3/5+1/2-8/14)x=0
4x²+37/70x=0
x(4x+37/70) x1=0 4x=-37/70 x2=37/280
742
a)x1=5,x2=3
p=-(x1+x2)=-(5+3)=-8
q=x1*x2=5*3=15
x²-8x+15=0
b)x1=-2,x2=6
p=-(x1+x2)=-(-2+6)=-4
q=x1*x2=-2*6=-12
x²-4x-12=0
749
x1=-2,x²+px-6=0
-2*x2=-6
x2=-6:(-2)=3
p=-(x1+x2)=-(-2+3)=-1