Question

. calcule o valor de delta
a) x² + 4x+ 4=0
B) x²-5=0
c) -2x²-5x-4=0

rápido pra agora

Answer 1

a) b^2 - 4 . a . c

4^2 - 4 . 1 . 4

16 - 16

delta = 0

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b) b^2 - 4 . a . c

0^2 - 4 . 0 . (-5)

delta = 0

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c) b^2 - 4 . a . c

(-5)^2 - 4 . (-2) . (-4)

25 - 8 . (-4)

25 - 32

delta = -7