Question

responde ai ta na foto a pergunta

Answer 1

= (x - 2)²
= x² - 2.2x + 4
= x² - 4x + 4

= (x + 4)²
= x² + 2.4x + 16
= x² + 8x + 16

= (x + 6)²
= x² + 2.6x + 36
= x² + 12x + 36

PA

(x² - 4x + 4; x² + 8x + 16; x² + 12x + 36)

r = a2 - a1
r = x² + 8x + 16 - (x² - 4x + 4)
r = x² - x² + 8x + 4x + 16 - 4
r = 12x + 12

r = a3 - a2
r = x² + 12x + 36 - (x² + 8x + 16)
r = x² - x² + 12x - 8x + 36 - 16
r = 4x + 20

r = r
12x + 12 = 4x + 20
12x - 4x = 20 - 12
8x = 8
x = 8/8
x = 1

Resp.: x = 1