Помогите решить уравнение 1. (x+4)^2-(x-2)(x+2)=0 2.(2x-5)^2-(2x-3)(2x+3)=0
3. (3x+5)(3x-5)-(3x-1)^2=10 
4, 2(2x+1)^2-8(x+1)(x-1)=34
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