Решение
<span>1 ) х </span>²<span> - 16 < 0
x</span>² - 16 = 0
<span>x</span>² = 16
<span>x</span>₁ = - 4
<span>x</span>₂ = 4
<span>- 4 < x < 4
2) х</span>² <span>- 95 < 0
x</span>² - 95 = 0
<span>x</span>² = 95
<span>x</span>₁ = - √95
<span>x</span>₂ = √95
<span>- </span>√95 < x < √95
<span>
3) х</span>²<span> + 1 > 0
x </span>∈ R
числитель(х-5)(х-7)+(х-1)(х-7)+(х-1)(х-3)=
=x^2+35-12x+x^2-8x+7+x^2+3-4x=3x^2-24x+45=3(x^2-8x+15)=3(x-3)(x-5)
знаминатель (х-1)(х-3)(х-5)(х-7)
=3/(x-1)(x-7)
Вроде так, в 17 не уверена
3/4.(-1,5) - 3 = -4,5/4 - 3 = -9/8 - 3 = -9/8 - 24/8 = -33/8