Without any + or - signs and an equality sign it has none
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If you mean: x2+8x-9 = 0 then the solutions are x = 1 and x = -9
2 this Domo
x2-10 = 0 x2 = 10 x = the square root of 10
x2 - 8x + 15
x2-8x=0 ( add 8x to both sides) x2 =8x (divide by x) x=8 ( x2divided by x equals x)