Question

Resolve ai -4x²+4x-1=0

Answer 1

$-4x^2+4x-1=0\\\\Coeficientes:a=-4,b=4,c=-1\\\\\Delta=b^2-4ac\\\Delta=4^2-4.(-4).(-1)\\\Delta=16-16\\\Delta=0\\x=\frac{-b+/-\sqrt{\Delta}}{2a}\\x=\frac{-4+/-\sqrt{0}}{2.(-4)}\\\textrm{Quando~o~Delta~tem~valor~igual~a~zero,~o~valor~de~x~e'~so'~um.}\\x=\frac{-4}{-8}\\x=0,5$


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