Объяснение:
3x²+11x-4≤0
3x²+11x-4=0
x²+11x/3 - 4/3=0
по теореме виета:
x1 = 1/3
x2 = -4
x∈ [-4 ; 1/3 ]
-5x²-3x+2>0
5x²+3x-2<0
5x²+3x-2=0
x²+3x/5 - 2/5 = 0
x1 = 2/5
x2 = -1
x∈ (-1 ; 2/5 )
-11x²+12x-1 ≥ 0
11x²-12x+1≤0
11x²-12x+1=0
x²-12x/11+1/11=0
x1 = 1
x2 = 1/11
x∈ [1/11 ; 1]
Объяснение:
3x²+11x-4≤0
3x²+11x-4=0
x²+11x/3 - 4/3=0
по теореме виета:
x1 = 1/3
x2 = -4
x∈ [-4 ; 1/3 ]
-5x²-3x+2>0
5x²+3x-2<0
5x²+3x-2=0
x²+3x/5 - 2/5 = 0
по теореме виета:
x1 = 2/5
x2 = -1
x∈ (-1 ; 2/5 )
-11x²+12x-1 ≥ 0
11x²-12x+1≤0
11x²-12x+1=0
x²-12x/11+1/11=0
по теореме виета:
x1 = 1
x2 = 1/11
x∈ [1/11 ; 1]