1)2x²-2x²+5x-4x+2=5 3)x²-7x-11-5x²+13x+18=16-4x²
x+2=5 -4x²+6x+7=16-4x²
x=3 6x=9 x=3/2 x=1.5
2)y³+y+3-6y-4+5y=-2 4)y²-5y⁵-19-5y²+6y⁵+9=22-4y²
y³=-1 y⁵=32
y=-1 y=2
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(10x + 45)e^(1-x) + (5x^2 + 45x - 45)e^(1-x)(-1) = e^(1-x) (10x + 45 - 5x^2 - 45x + 45) = e^(1-x)(-5x^2 - 35x + 90)
-5x^2-35x+90 = 0
X^2 + 7x - 18 = 0
D = 49 + 72 = 121
x = (-7 + 11)/2 = 2
x = (-7 - 11)/2 = -9
- + -
____-9_______2___>
Min. Max
Ответ: -9