1 Способ
-x^2-8x=0
-x(x+8)=0
x=0 or x=-8
2 Способ
D= 8*8 - 4 * (-1) * 0 = 64
x1=8-8/-2=0
x2=8+8/-2=-8
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Answers & Comments
1 Способ
-x^2-8x=0
-x(x+8)=0
x=0 or x=-8
2 Способ
D= 8*8 - 4 * (-1) * 0 = 64
x1=8-8/-2=0
x2=8+8/-2=-8