Question

(x + y)² =
(2a + b )² =
(x - 5y )² =
(3-a² )² =
(2a + 2b)² =​

Answer 1

Explicação passo-a-passo:

(x + y)² = x² + 2xy + y²

(2a + b)² = 4a² + 4ab + b²

(x - 5y)² = x² - 10xy + 25y²

(3 - a²)² = 9 - 6a² + a⁴

(2a + 2b)² = 4a² + 8ab + 4b²

Answer 2

(x + y)² =

(x + y)(x + y)

x² + xy + xy + y²

x² + 2xy + y²

(2a + b )² =

(2a + b)(2a + b)

4a² + 2ab + 2ab + b²

4a² + 4ab + b²

(x - 5y )² =

(x - 5y)(x - 5y)

x² - 5xy - 5xy + 25y²

x² - 10xy + 25y²

(3-a² )² =

(3 - a²)(3 - a²)

9 - 3a² - 3a² + a⁴

a⁴ - 6a² + 9

(2a + 2b)² =

(2a + 2b)(2a + 2b)

4a² + 4ab + 4ab + 4b²

4a² + 8ab + 4b²