Question 1017165
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<pre>
{{{(2x+1)^2}}} = {{{4x^2-1}}}.

{{{4x^2 + 4x + 1}}} = {{{4x^2-1}}},

{{{4x +1}}} = {{{-1}}},

{{{4x}}} = {{{-1 -1}}},

{{{4x}}} = {{{-2}}}.

Can you complete it yourself?
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