-5y=25-4x 5y=4x-25 y=4x-25/5 3x-2(4x-25/5)-0,5=3x-8x-50/5-0,5 3x/1-8x-50/5-5/10
5X^2 - 7X^2 - 11X - 5 < 0
- 2X^2 - 11X - 5 < 0
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D = 121- 4*(-2)*(-5) = 121 - 40 = 81
V D = 9
X1 = ( 11 + 9) : ( - 4 ) = ( - 20/4) = ( - 5 )
X2 = 2 : ( - 4 ) = ( - 0,5 )
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X1 < ( - 5 )
X2 < ( - 0,5 )
5^7*x^21/5^6*x^16= - 160
5x^5= - 160
x^5= - 32
<span>x= - 2</span>
X²-4x=5
x²-4x-5=0
D=4²-4×(-5)×1=16+20=√36=6
x1 = (4+6)/2=5
x2= (4-6)/2=-1
Ответ: 5;-1