Question

25 Pontos agora, Com a formula de Bhaskara resolva.

A) x²+6x+9=0

B) x²-4x+4=0

C) 4x²-12x+9=0

Answer 1

Δ = b²  - 4.a.c
Δ = (6)² -  4 . 1 . 9
Δ = 36 - 36
Δ = 0

x = -b +- √Δ / 2.a
x = - 6 +- √0 /2.1
x= -6 +- 0 / 2
x1 = -6 / 2 = - 3
x2 = -6 / 2 - 3

Answer 2

A) x² + 6x + 9 = 0

delta = 6² - 4.1.9
delta = 36 - 36
delta = 0


x = -6 ± √0/2.1

x = -6 ± 0/2 = -6/2 = -3

s={ -3 }
.
.
.
B) x² - 4x + 4 = 0


delta = (-4)² - 4.1.4
delta = 16 - 16
delta = 0


x = -(-4) ± √0/2.1

x = 4 ± 0/2 = 4/2 = 2

s={ 2 }
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.
.
C) 4x² - 12x + 9 = 0


delta = (-12)² - 4.4.9
delta = 144 - 144
delta = 0


x = -(-12) ± √0/2.4

x = 12 ± 0/8 = 12/8 = 3/2

s={ 3/2 }





☆Espero ter ajudado! tmj