Question

identifique os coeficientes e calcule o delta para cada equação
​

Answer 1

Resposta:

A) 2x2 - 11 + 5 = 0

Δ = b2 - 4ac

Δ = (-11)2 - 4.2.5

Δ = 121 - 40

Δ = 81

Coeficientes: A= 2; B= -11; C= 5

B) 2x2 + 4x + 4 =0

Δ = b2 – 4ac

Δ = 42 – 4.2.4

Δ = 16 – 32

Δ = - 16

Coeficientes: A= 2; B= 4; C= 4

C) 4 – 5x2 = 2x

4 – 5x2 – 2x = 0

Δ = b2 – 4ac

Δ = (-2)2 – 4. (-5). 4

Δ = 4+80

Δ =84

Coeficientes: A= -5; B= -2; C= 4

D) X2 – 11x +28 = 0

Δ = b2 - 4ac

Δ = (-11)2 – 4.1.28

Δ = 121-112

Δ =9

Coeficientes: A= 1; B= -11; C= 28

E) 4x2 +2x +1 =0  

Δ = b2 - 4ac

Δ =22 – 4.4.1

Δ = 4-16

Δ = -12

Coeficientes: A= 4; B= 2; C= 1

F) 2x2 – 4x -1 = 0

Δ = b2 - 4ac

Δ = (-4)2 – 4.2.(-1)

Δ = 16+8

Δ = 24

Coeficientes: A= 2; B= -4; C= 1

G) X2 +8x + 16 =0  

Δ = b2 - 4ac

Δ = 82 -4.1.16

Δ = 64-64

Δ = 0

Coeficientes: A= 1; B= 8; C= 16