Question

resolva as equações:

a)2x²-5x-3=0 Δ=b²-4.a.c


X=-b+- √Δ
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2.a​

Answer 1

□OLÁ! TD BEM?

A) 2X² - 5X - 3 = 0

Δ = B² - 4 a.c

Δ = (- 5)² - 4 . 2 . (- 3)

Δ = 25 + 24

Δ = 49

X = - B ± √Δ /2.a

X = - (- 5) ± √49 /2.2

X' = 5 + 7 /4

X' = 12/4

X' = 3

X" = 5 - 7 /4

X" = - 2/4

X" = - 1/2