-2*(5 - x) = 1,5x + 0,5*(x + 4)
-10 + 2x = 1,5x + 0,5x + 2
2x - 10 = 2x + 2
- 10 = 2
уравнение не имеет решения
<span>3x²-48=0
x</span>²=16
x=-4
x=4
<span>б) 8y²-5y-3=0
D=25+96=121 </span>√D=11
у=(5+11)/16=1
у=(5-11)/16=-6/16=-3/8
8y²-5y-3= 8*(х+(3/8)*(х-1)=(8х+3)(х-1)
<span>в) -x²-4x-3=0
D=16-12=4 </span>√D=2
x=(4+2)/-2 =-3
x=(4-2)/-2 =-1
<span>-x²-4x-3 =-1*(x+3)(x+1)=(-x-3)(x+1)</span>
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