Х²-7х+10=0
d=49-4*1*10=9
x1=(7+3)/2=5
x2=(7-3)/2=2
x1=5 x2=2
y1=25-35+10=0 y2=4-14+10=0
<span>1) у=5-х
х^{2}- 15 +3x=-15
x^{2}+3x=0
x(x+3)=0
x=0 или х+3=0
х=-3 </span>y=5 x=-3<span>x=0 y=8</span>
<span> -7x+1>-1 </span>
-7х>-2
7х<2
х<2/7
X(x+1)(x+2)=3333(x+x+1+x+2)
x(x+1)(x+2)=3333*(3x+3)
x(x+1)(x+2)=3333*3(x+1)
x(x+2)=3333*3
x^2+2x-9999=0
D=4+44*9999=40,000=200^2
x>0 ///////////////// x=-2+200/2=99
/ //// / /// / // /// x+1=99+1=100
////////////////////// x+2=99+2=101
сумма этих чисел:
99+100+101=300