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Mathematics 17 Online
OpenStudy (anonymous):

x^2+2x<8 with medal

OpenStudy (haseeb96):

x^2+2x-8<0 x^2+2x-4x-8<0 x(x+2)-4(x+2)<0 (x-4)(x+2)<0 either x-4<0 or x+2<0 x<4 or x< -2

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