Question

calcule e em seguda assinale a alternativa correta(x+7)²b)5+2m)²3x+4)²(x+0,5)²​

Answer 1

(x+7) . (x+7)

x² + 7x + 7x + 49

x² + 14x + 49

(5+2m) . (5+2m)

25 + 10m + 10m + 4m²

25 + 20m + 4m²

(3x+4) . (3x+4)

9x² + 12x + 12x + 16

9x² + 24x + 16

(x+0,5) . (x+0,5)

x² + 0,5x + 0,5x + 0.25

x² + 1x + 0.25