Question

Resolva
Y = - X² + 10x - 25

Answer 1

Olá!

$D= b^{2} -4.a.c \\ D= 10^{2} -4.-1.-25 \\ D=100-100 \\ D=0$

$x=(-b+/- \sqrt{D} )/2.a \\ x'=(-10+0)/2 \\ x'=-5 \\ \\ x''=(-10-0)/2 \\ x''=-5$

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