Question

fatora os polinômios abaixo
a) 81x²-1=

b) a⁴-121b²=

C) 1/4- 4/9y² =

d) -25+d⁴=​

Answer 1

Resposta:

a)81x² - 1 = (9x + 1)·(9x - 1)

√81x² = 9x

√1 = 1

b)a⁴ - 121b² = (a² + 11b)·(a² - 11b)

√a⁴ = a²

√121b² = 11b

c)1/4 - 4/9y² = (1/2 + 2/3y)·(1/2 - 2/3y)

√1/4 = 1/2

√4/9y² = 2/3y

d)25 - d⁴ = (5 + d²)·(5 - d²)

√25 = 5

√d⁴ = d²