Ответ:
f (x) = -3x2 + 2x,
f (x) = 0,
0=-3x² + 2x,
-x * (3x-2) = 0.
x1=0, 3x-2=0,
3x = 2,
х2=2/3,
f (x) = -1,
-1=-3x² + 2x,
3x²-2x-1=0,
Д= (-2)² - 4*3*(-1) = 4 + 12 = 16, x1= (2 + 4)/2*3 = 6/6 = 1,
x2 = (2-4)/2 3 = -2/6 = -1/3,
f (x) = -56,
-56=-3x² + 2x,
3x2-2x-56 = 0.
A=(-2)²-4*3*(-56) = 4 +672 = 676,
x1 (2+26)/2*3=14/3=4 2/3,
x2 (2-26)/2*3=-24/6=-4
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Answers & Comments
Ответ:
f (x) = -3x2 + 2x,
f (x) = 0,
0=-3x² + 2x,
-x * (3x-2) = 0.
x1=0, 3x-2=0,
3x = 2,
х2=2/3,
f (x) = -1,
-1=-3x² + 2x,
3x²-2x-1=0,
Д= (-2)² - 4*3*(-1) = 4 + 12 = 16, x1= (2 + 4)/2*3 = 6/6 = 1,
x2 = (2-4)/2 3 = -2/6 = -1/3,
f (x) = -56,
-56=-3x² + 2x,
3x2-2x-56 = 0.
A=(-2)²-4*3*(-56) = 4 +672 = 676,
x1 (2+26)/2*3=14/3=4 2/3,
x2 (2-26)/2*3=-24/6=-4