Question

Urgente socorro pfv!!!

Resolva os produtos notáveis:

a) (2x + 3) . (2x + 3) =

b) (2x + 3) . (2x – 3) =

c) (2x – 3) . (2x – 3) =

d) (a + b) . (a – b) =

e) (a + b) . (a + b) =

f) (a – b) . (a – b) =

g) (4x + 1) . (4x – 1) =

h) (5 + 2x) . (5 + 2x) =

i) (a² - 2y) . (a² - 2y) =​

Answer 1

Use que: (a ± b)² = a² ± 2ab +b² e a² - b² = (a - b)(a + b)

a) (2x + 3) . (2x + 3) = 4x² + 12x + 9

b) (2x + 3) . (2x – 3) = 4x² - 9

c) (2x – 3) . (2x – 3) = 4x² - 12x + 9

d) (a + b) . (a – b) = a² - b²

e) (a + b) . (a + b) = a² + 2ab + b²

f) (a – b) . (a – b) = a² - 2ab + b²

g) (4x + 1) . (4x – 1) = 16x² - 1

h) (5 + 2x) . (5 + 2x) = 25 + 20x + 4x²

i) (a² - 2y) . (a² - 2y) =​ a^4 - 8ay + 4²