Question

Exercitiul 8 va rog dau coroana!!!​

Answer 1

a)

${x}^{2} + 2xy + {y}^{2} = {(x + y)}^{2}$

b)

${x}^{2} + {y}^{2} + 2xy = {(x + y)}^{2}$

c)

$4 {x}^{2} - 4x + 1 = {(2x - 1)}^{2}$

d)

$9{x}^{2} + 1 + 6x = {(3x + 1)}^{2}$