Объяснение:
a)
ОДЗ: x-2≠0 x≠2 x+2≠0 x≠-2. ⇒ x∈(-∞;-2)U(-2;2)U(2;+∞).
b)
x*(x+2)-7*(x-2)=8
x^2+2x-7x+14-8=0
x^2-5x+6=0.
c)
D=1 √D=1
x₁=2 x₂=3.
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Объяснение:
a)
ОДЗ: x-2≠0 x≠2 x+2≠0 x≠-2. ⇒ x∈(-∞;-2)U(-2;2)U(2;+∞).
b)
x*(x+2)-7*(x-2)=8
x^2+2x-7x+14-8=0
x^2-5x+6=0.
c)
D=1 √D=1
x₁=2 x₂=3.