Question

a) (x+2)²
b) (x-3)²
c) (2r-1)²
d) (3r+1)(3r-1)​

Answer 1

Resposta:

a)$x^2 + 2x + 4$

b)$x^2 + 6x + 9$

c)$4r^2 - 2r + 1$

d)$9r^2 - 6r + 1$

Explicação passo-a-passo:

a)

$(x+2)^2\\x^2 + 2x + 4$

b)

$(x-3)^2\\x^2 + 6x + 9$

c)

$(2r-1)^2\\4r^2 - 2r + 1$

d)

$(3r+1)\times(3r-1)\\(3r-1)^2\\9r^2 - 6r + 1$