Question

Resolva a equaçao
x²-2raiz de 5x+4=0

Answer 1

${x}^{2} - 2 \sqrt{5} x+ 4 = 0$

delta:

$Δ = {( - 2 \sqrt{5} )}^{2} - 4 \times 1 \times 4 \\ Δ = 20- 16 \\Δ = 4$

bhaskara:

$x = \frac{2 \sqrt{5} \frac{ + }{} 2}{2} \\ \\ x = \sqrt{5} \frac{ + }{}1$