Question 1087414
{{{a(x-1)^2-1=0}}}
{{{a(x-1)^2=1}}}
{{{a=1/(x-1)^2}}}
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{{{system(a=1/(1/5-1)^2,and,a=1/(9/5-1)^2)}}}

{{{a=1/(4/5)^2}}}

{{{a=25/16}}}
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{{{f(x)=(25/16)(x-1)^2-1}}}

{{{(25/16)(x^2-2x+1)-1}}}

{{{(25/16)x^2-(50/16)x+25/16-16/16}}}

{{{highlight(f(x)=(25/16)x^2-(25/8)x+9/16)}}}