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4x^2 + 2x - 2x -1=0
4x^2=1
Despejamos la incógnita,
x^2 = 1/4
x = √1/4
x = 1/2
Comprobación,
(2x-1)(2x+1)=0
(2(1/2)-1)(2(1/2)+1)=0
(1-1)(1+1)=0
(0)(2)=0
0 = 0
Espero que te sirva, Saludos!!
2x+2x-2x-1
SE QUITA EL -2X Y +2X
2x²-1