Question 338520
{{{q(z)=z^2}}}
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{{{q(z+h)=(z+h)^2=z^2+2zh+h^2}}}
{{{q(z)=z^2}}}
{{{highlight(q(z+h)-q(z)=2zh+h^2)}}}
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{{{q(x^3)=(x^3)^2=x^6}}}
{{{q(2x+a)=(2x+a)^2=4x^2+4xa+a^2}}}
{{{highlight(q(x^3)+q(2x+a)=x^6+4x^2+4xa+a^2)}}}