Question 1132216
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It is not at all clear what you mean by "the value of the quadratic formula".<br>
The quadratic formula finds the roots (zeros) of a quadratic function using the coefficients of the function.  If that is what you are asking, then...<br>
{{{x = (-b +- sqrt(b^2-4ac))/(2a) = (-4 +- sqrt(4^2-4(4)(1)))/(2(4)) = (-4 +- 0)/8 = -1/2}}}<br>
That answer of course corresponds to the function in factored form:<br>
{{{(4x^2+4x+1) = (2x+1)^2}}}  -->  {{{2x+1 = 0}}}  -->  {{{x = -1/2}}}