Question

ESCREVA NA FORMA REDUZIDA:



a) x ∙ (x + 3) = 5x + 15

b) (x + 4)2 = 9x + 22

c) 2x ∙ (x – 3) – 6 = x ∙ (x – 1)

d) 8x2 – 10x = -4

e) – 6x – 8 = -3x2

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Answer 1

Resposta

a)

x^2 -2x -15= 0

b) 7x + 14= 0

c) x^2 - 5x - 6= 0

d) 4x^2 - 5x + 2= 0

e) 3x^2 - 6x - 8= 0

Explicação passo a passo:

a) x ∙ (x + 3) = 5x + 15

x^2 + 3x = 5x + 15

x^2 + 3x - 5x -15= 0

x^2 -2x -15= 0

b) (x + 4)2 = 9x + 22

2x + 8= 9x + 22

9x-2x + 22 -8= 0

7x + 14= 0

c) 2x ∙ (x – 3) – 6 = x ∙ (x – 1)=
2x^2 - 6x - 6= x^2 - x

2x^2 - x^2 -6x + x - 6= 0

x^2 - 5x - 6= 0

d) 8x2 – 10x = -4

8x^2 - 10x +4= 0

4x^2 - 5x + 2= 0

e) – 6x – 8 = -3x2

3x^2 - 6x - 8= 0