a) (3x^2+ 10x-8)^2= (5x^2-2x+10)^2b) (x^2-2x+1)-4=0c) 4x^2+4x+1=x^2d) (x+1)^2= 4(x^2-2x+1)^2e) (x^2-9)^2- 9(x-3)^2=0
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