РЕШИТЕ ПЛИЗ 10 БАЛОВ

Question

РЕШИТЕ ПЛИЗ 10 БАЛОВ

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Answer 1

(3x+1)^2-5x^2=-5+(2x-2)^2
9x^2+6x+1-5x^2=-5+4x^2-8x+4
9x^2+6x+1-5x^2+5-4x^2+8x-4=0
14x+2=0
x=-1\7