Question

Решите пример пж!!!!!

Answer 1

(x²-9)(x²+2x-3)=(x-3)(x+3)(x+3)(x-1)=0
x₁=3
x₂=-3
x₃=1
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D=4+12=16=4²
x1=(-2-4)/2=-3
x2=(-2+4)/2=1
x²+2x-3=(x+3)(x-1)