Question

Resolva essas 2 equações do 2 grau e tira a fórmula de Bhaskara?
-X²+2x+1=0

-5x²-4x+2=0

Answer 1

-X²+2x+1=0

$\Delta= b^{2} -4.a.c \Delta= 2^{2} -4.(-1).1 \Delta=4+4=8 x=-+(2) \sqrt{8} /2=1 \sqrt{8}$


-5x²-4x+2=0
$\Delta b^{2}-4.a.c  \Delta= -4^{2} -4.(-5).2  \Delta=16+9=25 x1=-+(-4) \sqrt{25}/2=4-5/2=-1/2$
$x^{2} -+(-4) \sqrt{25} /2=4+5/2=9/2$