Respuesta:
(x+1)²+3=(x+2)²-x²
x²+2x+1² +3 = x²+4x+2²-x²
x²+2x+1+3 = x²+4x+4-x²
x²+2x+4 = 4x+4
x²+2x-4x+4-4=0
x²-2x=0
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Respuesta:
(x+1)²+3=(x+2)²-x²
x²+2x+1² +3 = x²+4x+2²-x²
x²+2x+1+3 = x²+4x+4-x²
x²+2x+4 = 4x+4
x²+2x-4x+4-4=0
x²-2x=0