X^2+8x+7>0 и x^2-16>или=0 помогите срочно надо
2x²-8x)/(x-7)-x≤0 (2x²-8x-x²+7x)/(x-7)≤0 (x²-x)/(x-7)≤0 x(x-1)/(x-7)≤0 x=0 x=1 x=7 _ + _ + ---------------[0]-----------[1]---------------(7)---------------- x∈(-∞;0] U [1;7