Question

calcule o valor numerico da expressao bao quadrado -4 a)1`,b=5e c=-6

Answer 1

b²-4.a.c →
5² - 4 × 1 × (-6) =
25 - (-24) = 49

x= -b +/- √ △
. ---------------
. 2×a

x= -5 +/- √49
. ---------------
. 2×1

x= -5 +/- 7
. ------------
. 2

x¹= -5 + 7 2
. -------= ---- = 1
. 2 2

x²= -5 - 7 -12
. --------- = ---- = -6
. 2 2